Hi Dev
Its nice to hear someone trying to do a single long take. I happen to do one which was 111 mins long. I think, it did get itself registered in the Guinness books as well. If u really ask i was with a heavy system but yes we did quite a few run through, in fact we also had a flashback placed in the end as a single take.
its imp for the operator to be given cues during the take so as to the actors off camera. Try and keep minimum crew during the shot helps keep the operator in control.
there a quite a few steadicams now with the least possible weight and also go with the back mounted harness, from walter klassen.
if u need any help u could just buzz me.
All the best,
Regards
Nitin
+919820051071
getagrip07@gmail.com