SALMONBUG

The only major mod that I heard of, was someone that cut the top off his rudder to give it less area, and I don't know if this was actually decided as a 'good' thing. He said it helped improve knife edge coupling in flight...but I don't know how it affected other maneuvers.

From what I've been reading, the plane was obviously designed for the smaller engines in the recommended range. Because for a .90 size engine (I plan on putting an OS 91 4-Stroke in mine), everyone is saying to add 2-3 washers to give it more right thrust.

As far as everything else people are doing, most of it is just preference, and strengthening up what they feel needs it...like the firewall, main landing gear block, tail wheel assembly, and any glue joint that looks suspect.

Hope this helps a little?

Mark