RE: Moki 2.1 or 1.8
I had a Moki 180 on my Giant Edge.
This motor was marginal for pullout maneuvers.
Recommend the 210 if you want to stay with glow.
I now have a piped MVVS 215 (Gas) on my giant, and absolutely love it.
It's the way to go with these planes, IMO. (What I should have done in the first place)