This thread has been very helpful to me. I'm actually interested in adding those spacers. The minimum weight that my arm carries is 40 lbs (that's with sled, battery, camera, etc.). Upper arm seems to be able to adjust lower but the forearm's adjustment knob is all the way backed out at 40. Does this sound normal? I find that I'm often adding weight to cater to the arm.
Will I have to send my arm to Tiffen to get spacers added? And, what type of weight range (including sled, batts, camera, etc.) would I be looking at with spacers?
Thanks,
Tony