1. Moved the two exhaust hanger rods to make sure I can later attach the cabin heat SCAT tubes. They are now angled outboard and attached to different tubes on the engine mount. Tightened down all exhaust attach hardware. 2. Most of the evening was spent installing the cabin heat muff. You definitely have to wrestle that thing a bit to get everything lined up right. But it's on there now, and it looks good! 3. I have realized that I will need to get the cowling installed before I work any more on the baffling, oil cooler, etc., since those things depend on me knowing the clearance I'll have from the cowl. To start the process, I temporarily installed the baseplate of a special spacer jig onto the engine. This tool will help me get the spinner and cowling aligned later. I will need to find some prop bolts in order to continue. 4. The next realization: In order to mount the cowling, the firewall can't be floppy at the top -- which means I need to permanently install the forward top skin. And I was delaying THAT because of the engine wiring I still have to install down in the avionics "hell-hole." So now it's time to hook up all the engine sensors -- or at least hook them up at the GEA 24 engine analyzer unit, and run the wires forward through the firewall. So I began that project by measuring the needed wire lengths for the Type K thermocouple wire (CHT and EGT) and starting to cut each sensor lead. I'm adding two feet onto each wire for contingencies. 5. Placed the order for my custom oil, fuel, and manifold pressure lines from Aircraft Specialty ("AS Flightlines") in Oconomowoc, WI. All of the lines except the MP sensor line will have an integral firesleeve. They were really nice and very knowledgeable. (When you're spending over $100 per hose on critical engine connections, it's good to talk to the people doing the work, and Steve seemed very competent and sharp.)