If you build it light at around 7.5 lbs the saito 100 would be an awesome motor for this combo. If the weight creeps up past 8 it will start to suffer. I think an ecstacy at 7.5 LBs with a saito 100 would be a very good combo. I have an OS 91 fx on mine and I had a saito 100 on an aerowrks edge at almost 9 lbs. I t would not pull out of a hover very well at almost 9 lbs but the worst case is you could use 25% nitro in the 100 and built light It would be an awesome combo. If you allready have It I would use it.