Prometheus wrote:

Sounds like you're on the right track. I wouldn't worry much about
the plywood- I've inlaid solid wood into solid wood several times, and
so far, no issues at all. Some of those pieces are several years old
now, and a few were left in uncontrolled enviroments for long periods
of time (hanging in the shop back when the shop was an unheated garage
with no insulation)

One of the reasons I'm thinking of using the plywood is that the inlay
is so thin. It's only .5 mm, which is about the thickness of two
playing cards. I can't quite figure out how to get a perfect fit
without glueing the inlay to something. If there's a way I haven't
thought about, that's why I'm asking.

DonkeyHody
"Every man is my superior in that I can learn from him." - Thomas
Carlyle