A year ago I bought this Tokai TE120 (rebadged as a Fender) from Japan. I knew what it was (the abalone binding must be unique?), & I knew it had been roughly routed for a neck humbucker. I decided to try fitting a P90.
I assumed I would have to get the body routed a bit more to give me the depth I needed, & to allow for it to be adjustable, but it seems I don't really need to. I got a Duncan Vintage P90, had a scratchplate made to fit, & I found that it screwed directly into the wood at about the right height. I guess it would be ideal to get it routed a bit more so the P90 can sit on springs or foam to make the height adjustable, & I may still get that done.
But it works, & the P90 gives a very interesting sound. Because of the high output of the P90 (8k) I needed a bridge pickup that was quite loud too. Luckily I had a Duncan Broadcaster bridge pickup that also read 8k, so I fitted that. The P90 is still a little louder than the bridge pickup, so I suppose I ought to get that fixed professionally, but it's still kinda cool as it is.
What surprised me is how useful the middle position is - both pickups together is a really nice sound. I don't like the scratchplate I had made for it - it's too white & too thin, so it looks a bit cheap to me. Maybe I'll get that sorted one day too & get a better one made.