I've built an flown two-both with Como (Super Tigre) 51s. Great flying, stable platform. Things I would change: Shave all the weight off the thing that you can. They really build up heavy if straight from the box. Replace any heavy wood (which was most of it in mine). If you can find someone who knows how, core out the foam wing cores. I think I could build a balsa cowl that is lighter than the plastic one. Fuselage mounted aluminum gear would probably save an oz or two. A light Kommander would be a blast. Mine didn't have any vertical performance to speak of. And, get rid of the long floppy wing mounted LG. Looks goofy flopping around in the breeze. Last, use a stout .46 at least. A lesser .60 would be nice power, but likely heavier than a good .46 and no more powerful.