It's been interesting viewing all the comments concerning the Sig SE, as it's a model love flying very much.
I built mine back in 2004 and have thoroughly enjoyed flying it.
I powered mine with the OS46FX and attached a Macs Tuned Pipe muffler which has quietened it down and also given more power.
I "Tuned" the Pipe for improved "Torque", not maximum HP, in order to spin bigger props ( in this case an APC 12.25 x 3.75" which the 46FX can spin at about 13,000rpm : which is all i want).
It has unlimited Vertical straight off the deck after takeoff, and can hold a hover ( still practicing ), with power to spare for climb out.
The only thing so far that I cannot achieve is Knife Edge. I even lengthened the Rudder by 20mm, but still no success.
Anyone have difficulty doing Knife Edge with their Sig SE?
I built the wings straight, plus put cross-bracing in between the Wing Ribs, and also built a Fuel Tank hatch.
In order to keep the structural integrity in the Tank area, I fibreglassed that area, along with the Landing Gear mounting area.
and, as you can see, I built up a cowl around the Engine, which improves it's looks much much better than the "slab-sided" frontal area, that I see on many models.
All in all, it is a wonderful plane to fly, and always impresses me, even to the point, that I bought 2 more Kits, and a Wing kit, for future builds.
Future unit looks like getting an OS 56FS power unit.
All due credit to it's Designer!

Regards / Happy flying, OS46FX