Got some more done today, specifically the part I usually dread most - mounting the engine, and getting all the thrust angles to come out right with the prop thrust washer in the center of the cowl exit hole and without too much or too little clearance for the spinner backplate.

Did a bunch of measuring for the motor box to see how much I'd need to trim off, and in the end I missed it by about 3/32", but this ended up being no problem because it was easy to fix.

Glad I used only 3 bolts for the soft mount to attach to the motor box. I intentionally wanted the stance to be narrow, and even then I was able to get the outermost blind nut into the motor box, though it took some work with the Dremel router.

The motor box was very weakly glued, so I had to remove the worthless balsa triangle stock and the hot glue, and re-do it with some square beech stock, small wood dowels, epoxy and screws.

The engine fits completely within the cowl, and all that will be needed is a cut for the spark plug cap and of course the air exits, a little hole in the side to access the needles, and maybe (or maybe not...) a hole in the bottom for the choke rod.