ok, I've seen the threads from the past with the Twist 40 with a weedie 21, and dr Honda's smilar plane with a little mitsu 19.2.

What I'm wondering is if an ultra stick or ugly stick would suffice with a similar size engine? I've got a few of the smaller size engines and want something easy to transport. the ultra stick lite 120 is kinda big, that and I'm frustrated with it right now... I can't get that dang engine predictable (maybe I just need to start over with one of my recent homie 30's instead of the mac 32, and this time screw with it less) . So, what do you think I could get away with? I was thinking maybe a 60 or 90 stick

the engines I have to deal with are:
echo 16
poulan 18, 21, 24, 25, 32
echo 21.2
stihl 19
homie 25, 30
mac 28
ryobi 28, 31
zenoah 25ish (old green machine)
Kawasaki 22

The thought process Iwas going through at the flying field earlier was a simple conversion (less of the screwing around I did to the mac 32 I have on my USL), mag ignition, shortening the firewall to account for the nose weight. Iknow the poulans can be very light, there's not much metal on them, but the echos are similar (the 16 would need ignition work though I think), Ikinda had the poulan in mind because the 18, 21, 24 and 25 are interchangable and I have at least one of each. I'll look into the weights of my echo's and stihls

if someone has another cheap fun plane suggestion for sport/funfly type flying, I'm open, something fun to just throw around capable of all the usual stuff,I've resorted to to a beat up trainer (rest have issues) which is extremely BORING!!!!! I have the gas bug, and need something easy to haul to fulfill my need...

so, what do you think?