Greetings, I've installed a ST. 90 with Pitts style muffler. Almost identicle to the Toni. This is a much more sleek airframe. Mid-wing, much less dihedral, longer tail moment too. It will handle like the Shoestring. There's no way to re-inforce the firewall with fiberglass and resin , you just can't get in there to apply it, very tight. Two left wing panels, those idiots ! . Some of the hinge slots are "off" a little bit. The one for the tail wheel wire needs to be slotted down just a scoche. Other than that, it's quite a beauty. I thought that this thread would of had a few more replys but I'm not really surprised, most of what I have to share or discuss on my findings are usually ignored. Oh well, thanks for your time. Seeya, MM