The Kingtech K80 is now installed. I used Hi Temp silicon to hold the FOD screen on. I don't know how advisable that is. But I don't even know what that oring that comes with it is supposed to do. Orings deteriorate quickly. I suppose it goes over the starter motor? But there are really no detents or grooves to hold the oring in place. Seems like an afterthought, but maybe I'm not doing it right. There is a big glue glue flange inside the bifurcated ducting right where the engine intake goes. I had to grind that down for about 1 1/2 inches of length to clear the larger dia engine. Otherwise, it seems like the engine went in easily. I did have to add a little extra onto the engine mounting rails as the scews were half off the wood. Typical mods needed for choices in hardware unknown to the original designers. This is ready for it's first run-up.