Speed controller problems

I think I may have sourced the problems that I was having with Hive at the UK champs and it seems to come down to the spektrum I was using.

I tested the machine on 40meg with a futaba and it worked brilliantly.

I am wondering if anyone has similar problems with other speed controllers and spektrums? Also wondering if there is anything I can do with the spektrum itself to work with my speedos?