this post) showed up. Mike had soaked the exhaust manifold flange nuts on both sides of the engine with penetrating oil over the weekend and he set about breaking those joints so that the old muffler could be freed. Naturally, exhaust system fasteners being the way that they are, it was a bit of a struggle. But when I showed up this morning, the old muffler was out and the new one was ready for installation (see photo above).
Today, a new seat roller assembly and a new magneto distributor block should have arrived. Those will get installed tomorrow as the bits and pieces start going back together. The plan is to run up the engine and test fly the airplane on Thursday afternoon, and then for N631S and I to make the trek back to the DC area on Friday.