I like the sound of this...

Hey all,
I've owned about 10 Yamaha FB-01 synths over the years, and love the chip inside... YM2164 = FM goodness!
I inevitably sell them out of frustration over control or sound editing.
It occurred to me last-night that the synth runs on a z80 processor and I could either write a new rom chip, or hijack the chip with a plugin that completely changes how the synth works.

For all who have played with an FB-01... what would you change?
What would you add or fix?
Things like adding FM operators or adding stereo mixer resolution aren't an option (as it would change the YM chip), so this is really about control and editing.
ex: assigning a midi CC to the feedback level, getting rid of sysex, or controlling everything from OSC ARE possible!

Here's a reference http://www.synfo.nl/servicemanuals/Yama … MANUAL.pdf
thoughts?