Long story short: the roller bridge doesn't fit.
![Evil or Very Mad :evil:](./images/smilies/icon_evil.gif)
The posts are literally a millimetre or two too close together because, hey, it's THURSDAY so EVERYTHING FUCKING SUCKS.
Joking aside though: I'm not too bothered, because the trem probably wouldn't work properly anyway. It clicks and creaks like you'd expect a non-official brand part to do (the old unit in my CIJ JM did that) even before you throw the bridge issues into the equation, so I'm cool with it being effectively a hardtail. A JM-style P90 SG with a bolt-on neck, I guess.
The good news is, the bridge post spacing is the same as that of a CIJ Fender! So the roller bridge is now fitted to my #1 instrument, and when I work out how to remove the old bridge cups and replace them with the roller TOM's mounting rings, it really will be 100% solid. So yeah. I'll get some new strings for this partsmaster on the way home from work tomorrow and get properly acquainted with it over the weekend. I'm kinda interested to hear how P90s sound.
Paul_ could be right about the origins though...the parts all look like what's advertised on that site. Doing a quick google search, I found other online stores that sell kits to make LP Juniors, ES-335s(!) and even twelve-string Strats and Teles. Wild.
![Shocked :shock:](./images/smilies/icon_eek.gif)