If you get a magnifying glass and look at the clone's PCB (at least the one I'm going to use for the donor), the soldering points are pretty clearly marked (L R F B). The only thing I have to watch for is witching F and R, since the controls are backward between the donor PCB and my ZZ transmitter (I want to use the ZZ transmitter).
Hope this helps...and also thanks to Stridex and alot of others on this board. Lot of knowledgeable ground breakers here.
Also kudos to the board admins for not locking every thread that seems to be a repeat. I find that even if something has been discussed, there may be someone out there with a new idea.
Case in point...while discussing whether I should use one clone or another for my PCB swap (which I haven't done yet, my daughters just seem to want too much of my time these days), Stridex had mentioned a few parts from an old CD-ROM drive that would be really cool to make these even more "swappable", and damn, I am now rummaging all over the place for parts. I think I found a really good receiver antenna wire from a length of front door bell wire....solid copper, and not TOO stiff
)