I had my since new, threat it like it's my 2nd wife (that's what my wife says ) & it's 26yrs old with collector plates now.

I thought maybe you just wanted to add the 5-led bulbs & octopus cable for leds only. But if you are interested in modernizing, I'll find the threads I did for these mods from BW & post them here, have a lot of info in them you'll find useful.

When I did mine, the 44 key version wasn't available, it'll work.
Just make sure you buy the controller with the led strip from the same guy (not separately). If you go for "common anode" controller, make sure you get common anode RGB led strips, vise versa with common cathode, won't work if mixed. I think I bought common anode.