I have flown the QQ 85 with the Hacker electric setup. It was heavy because of the amount of batteries on board and it still flew great (18lbs). It is 15lbs with a DA 50.

I have one of the KMP (extremeflight rejects, toc1, avaition models) yak 54. It is setup for 3d but it can still fly sequences with no problem. I have no doubt if it was setup for precision that is would fly great.

Jeff from Desert Aircraft is flying the aviation models version of the Yak and he is very competitive with it