I finished my radio. It was tough working with black tee shirt fabric I chose. I think I cut it much too generously (that wasn't too bad -- I cut the excess fabric off) and also the fabric folded on itself in two places on each side of the enclosure frame. I suspect that wasn't good at all. It was very difficult getting the final two plywood "sides" to snap on. At the bottom edge of the radio they would stubbornly pop out of the press-fit holes. Time had run out on me with this project, though: the radio had to be given to my friend. I might possibly have been able to justify an additional delay, the friend would have been gracious about it, but...I wanted it done (impatience on my part.)
I used glue and clamps to get the final two pieces of plywood to stay on. As mentioned in the post above, the right hand knob for the station tuning pot would not install correctly. I'm going to have to find a knob that really fits and looks the same as the ones that came with the radio. Or, replace both knobs with two different knobs.
Another small issue I discovered while working with the enclosure assembly is that there is no silk screening text to identify the pins which were brought out to headers on the bottom surface of the PCB. The ICSP header should be silkscreened too.
Given that I was impatient with the fabric covering part, my final judgement is this kit is not ready for prime time. It has too many small defects that need to be corrected. The "FabFM Radio Kit" silk screening mistake is a bit embarrassing, and it is, to me, a sign of other mistakes with the kit. Removing pin 14 on the "polarization" justification isn't the best way -- that is not the Arduino way or the Creative Commons way.
I think the next time I work on a radio, I want to buy the PCB and circuit components and the actual radio enclosure separately. This has been a very interesting project for me overall, even though I feel this kit needs improvement. I have learned from it.