All right, back from holidays. I have been waiting to fly my Cub off skiis, but it snowed like made here on Dec 23rd, and by the time we got back on the 30th, it was all melted!

Oh well. Here's the progress today:

I mounted the muffler and cleared out the bottom of the cowl to fit. The cowl is now screwed in place too. You can clearly see the concave bubble that get installed if you choose to mount the engine this way. The muffler fits perfectly in this pocket. Overall I like the look. It's not quite as nice as a proper in-cowl muffler, but it doesn't stick out like normal, and the rest of the engine is nicely covered. Just the head popping out. I'd still prefer an inverted completely cowled engine, with an inverted pitts muffler, but nobody makes a good invereted pitts for these small engines.