Yep, I'm still in the "teasing" stage. I had a Fuji 43 on order and now that say early April for delivery. Mine is complete except for engine and ignition system.
http://www.bcmaengines.com/
I may have one of these engines for an engine review, maybe the 40cc size.
That engine may be a good candidate for the YAK, but nobody has had experience with them.
They sound good on paper, power and weight wise.