Bosshossv8,
The gas burner S.T. 90 should be plenty of motor. I had a S.T. 75 (nitro) on a Kat 70 that flew really nice. There is a video in the TOC website of the Yak with the red/white color scheme, this is electrified, check it out,
http://www.toc1.com/Video/video.html
mstcitabria