I did the "top mount joystick" search, read a pile of threads, and not happy with what I've found so far - not that the solutions are bad (some are really quite good), I'm just looking for something else.
The issue, as I see it, is after routing and mounting, you are going to have to deal with either bolt heads or some other reason to apply bondo, or throw another layer of wood over it all; for example:

In the above image, you could forgo the top layer and just bondo the gaps. Either way, I have yet to find a solution that speaks to me.
So I got to thinking (that's the smoke you smell)...
what if you were to thread the holes in the joystick mounting plate, then using a bolt with head removed (or threaded rod, etc) and some J-B Weld (or similar), inserting said bolt so it sits flush with the top of the mounting plate and is "glued" in solid. Seems at this point you could drive a few holes into the CP and use nuts to hold it all down. It would be perfectly flush (ok, maybe not 100% perfect, and maybe a little bit of the bondo to tidy things up, but that's still ok w/ me)
iirc, I think I saw here someone weld such a thing. This kind of solution speaks to me. I can't weld, and imagine getting it done would be cost prohibitive. But cutting the head off a bolt and threading some holes, that sounds more affordable and in my naive world view should do the trick just fine.
Advice? Mockery? Links to existing products which make all this unnecessary?
thx