I like the tail servo idea but with the choice of the 1.80 it requires a bunch of other equipment be moved just behind the firewall. I am not sure of the weight mine is at but the Mk bellcrank with elevator servo up front does save quite a bit. A gas engine would be great on yours. Something in the 2.4 cid range would be nice. Brison or ZDZ maybe. If I get tired of buying glow fuel this summer for my 1.80 I may switch to a gasser on my EDGE!