Well, despite ham-fisting a couple of hinges, I'm pretty happy with the way things turned out.
Here is what came out:

Here is how it looks now:

The old plastic looks similar enough to the new plastic that I don't feel an immediate need to replace the stuff that didn't really need replacing.

I went pretty slow, trimming bit by bit, and was pretty happy with the fit.

I was able to reuse the stock insulation everywhere except the front two panels. The insulation was fused to the panels so I don't have any insulation there now. Now that I'm a little more comfortable with this type of work I'll probably put in some Selkirk foam though I admit, the yucky old black tar looks pretty intimidating to remove.
I will refinish the arm rests after I fly for a while. Weather seems to be turning here so I'd like to get a few hours flying in the near future.
I have 4 cheap mesh pockets, one for each door and each forward panel. I know mesh isn't the best for holding stuff like the control lock or fuel sampler, but for $8 I figure I'll give them a try. I also have a budget Amazon sheepskin seat cover that I'm going to try on the seat. Just the top, not the sides. Since it is not permanent I'm not too fussed about burn certs.
I used self-tappers that I had on hand to install the door panels but used nice stainless screws on the rest after my Aircraft Spruce screw order arrived. I only used two screws in each panel because I had a hell of a time lining up holes in my panels with existing holes on the aircraft. I'll get my mechanic to put in a couple more on each panel because I'm still not comfortable drilling holes.
I found some 1/8" rod on Amazon and will make temporary hinge pins. The hinges on the pilot door are a bit beat up but I figure they will hold for a few hours. With doors and windows closed the pressure should keep the door in place, not try to rip it off.
Couple questions:
- The vinyl with the ensolite backing has a fair bit of weight to it and lies nice and flat. Should I leave it or add the velcro that was included to hold it in place?
- Is there any reason to keep the used panels? They are pretty ugly but the backing seems solid and they could maybe be re-used by someone else?