I did my 4*60 as an open-cockpit sportster with rounded lines to replace the square look of the original. The wingtips are built-up but could be done in foam more easily. I re-built the fin and made a completely new rudder out of 3/8 thick balsa plywood (i.e. 3 layers of 1/8 glued crossgrain). The nose was flared out with balsa beginning at the wing trailing edge. The cowl is fibreglass and I did it as a lay-up on foam.

One of these days I'll make some wheel pants for it too...

Power is a SuperTigre G-75 with a Bisson Pitts-style muffler.