Premium Members Afton Grant Posted July 16, 2015 Premium Members Report Share Posted July 16, 2015 Victor, I just went to a shop local to me here in CT. I'm sure any shop could do it. Alec, I had a long discussion with the machinist about any weakening that might occur. He assured me there was so little that needed to be taken off, the change in strength would be essentially zero. In fact, if there's concerns about strength, you can equally compromise the male pin if you try to sand it down yourself and it's not done evenly. In both cases, the actual measurable compromise that's occurred is negligible. I vote for modifying the female end, just in case you ever need to use any other arm. 1 Quote Link to comment Share on other sites More sharing options...
Premium Members Rich Cottrell Posted July 17, 2015 Premium Members Report Share Posted July 17, 2015 On the flip side, 10 years ago when I bought my PRO arm I was told I would probably "need" to buy a pro socket block for the model 2 vest I used. So I did. Truth be told, the pro arm worked fine on that model2 vest's socket block. Go figure. Rich Quote Link to comment Share on other sites More sharing options...
Moderators Alec Jarnagin SOC Posted July 17, 2015 Moderators Report Share Posted July 17, 2015 Jerry, Fair enough…. My point was that there is no one trying to sabotoige anyone else here (so no justification for conspiracey theories). It made sense to me that tolerances were not as refined back in the beginging so I decided to opt for throwing the company that no longer exists under the bus rather than point fingers at the current reigning chanmpions. Afton, I agree it is a trivial amount; I was just cautioning to be careful with Titanium (versus Steel and Aluminum). If you can file Titanium too, please state so as I know that it is strong in certain regards, yet brtittle. Oh, and I would also add that I would not be the least bit surprised if the socket block PRO measured was pre-1986 as it likely was an arm that belonged to George Paddock, Chris Haarhoff, Dave Emmerichs or one of those original folks who had already been at the game a long time before they built the PRO arm (and if you recall CP was not selling indiviudal parts to these guys then). Quote Link to comment Share on other sites More sharing options...
Premium Members Afton Grant Posted July 17, 2015 Premium Members Report Share Posted July 17, 2015 Afton, I agree it is a trivial amount; I was just cautioning to be careful with Titanium (versus Steel and Aluminum). If you can file Titanium too, please state so as I know that it is strong in certain regards, yet brtittle. Yeah, I certainly wouldn't consider going at this myself with a file by any means, but there exist readily available tools that will scratch titanium. $60 was well worth it to know it was done with the right tools by professionals. Also, my machinist seemed much more eager to machine the titanium socket block than he was to machine the hardened steel pin block. I can only guess this had something to do with the heat generated by the CNC process - and the machinist not wanting to remove the hardness from the block. This should be something seriously considered if anybody is going to try this themselves with power tools. Too much heat will permanently soften the steel block, requiring it to undergo the hardening process again. Quote Link to comment Share on other sites More sharing options...
Premium Members Ants Martin Vahur Posted July 19, 2015 Premium Members Report Share Posted July 19, 2015 Hi! Am I fine other way around? I just got my new PRO arm and it works seemingly fine with the Master vest. I also ordered the exo-vest. Should I be worried about the tiny play or you, guys, think it's fine? All the best!Ants Martin Quote Link to comment Share on other sites More sharing options...
Moderators Alec Jarnagin SOC Posted July 19, 2015 Moderators Report Share Posted July 19, 2015 Ants, you are fine in that direction. 1 Quote Link to comment Share on other sites More sharing options...
Premium Members Sanjay Sami Posted July 20, 2015 Premium Members Report Share Posted July 20, 2015 Ants - the PRO arm works fine with all Tiffen vests including the Exovest. Quote Link to comment Share on other sites More sharing options...
Premium Members Victor Lazaro Posted July 22, 2015 Premium Members Report Share Posted July 22, 2015 Well, just tried Mike O'Shea's G70 on my PRO vest, and it fits. It might be a gamble with tolerances of both parts or Jack actually changed the new blocks (my vest is brand new). Quote Link to comment Share on other sites More sharing options...
Premium Members Ryan Toussieng Posted July 23, 2015 Author Premium Members Report Share Posted July 23, 2015 Interesting, my vest is brand new as well. Tolerances... They'll getcha! 1 Quote Link to comment Share on other sites More sharing options...
Premium Members Tommy Stork Posted April 27, 2016 Premium Members Report Share Posted April 27, 2016 Victor, Jack didn't change the prints on the socket block. Back when I bought my 3A arm the socket block was .008 ( keep in mind a human hair is roughly .003 to .004, so we're not talking about a whole hell of a lot extra metal here) over the size of the PRO female socket block. I took some 220 grit cloth to the boss on the male socket block to get it to the PRO socket block ID. When I got it so it fit very snugly I hit it with some 600 grit cloth for the final passes to clean up any marks left by the heavier grit. Took about ten minutes. Cut the cloth in a 1" x 12" strip wrap it around the boss on the male socket block and pull it back and forth continuously in a clockwise fashion until you have gone 360 degrees, then go back the other way 360 degrees (i know, there are many jokes in here for Ron to capitalize on). We do this at the shop, (at least when we were in Valencia) for customers who bought our vest and still had Tiffen arms. Keep a dial vermeer caliper nearby when doing this and test the boss frequently while sanding so you know when you are getting close to matching the ID of the PRO female socket block. When the two parts almost mate ditch the calipers and take a couple more passes with the sandpaper and try another test fit or two, until you get the fit you desire. 1 Quote Link to comment Share on other sites More sharing options...
Premium Members RonBaldwin Posted April 27, 2016 Premium Members Report Share Posted April 27, 2016 I licked mine and now it fits great 2 Quote Link to comment Share on other sites More sharing options...
Premium Members Alan G. Kelly SOC Posted May 11, 2016 Premium Members Report Share Posted May 11, 2016 Interesting. From day one my G70 has always mated perfectly with my Pro vest. No gaps, no wiggle, no issues. Quote Link to comment Share on other sites More sharing options...
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