Analogue-sequencer

Folks,

I've got another project in the works, soon to be at the beta 
testing stage. It's a tiny daughterboard to fit inside a TB303, that 
adds midi in and out.
This isn't another cv/gate modification. The board replaces the DAC 
latch in the 303 with a PIC processor, and hooks into the gate, 
accent and slide control lines. Installation requires no cutting of 
tracks - it just needs the removal of a 16 pin IC, and three 
resistors.
The board will occupy the area inside the 303 shown here:
http://www.colinfraser.com/misc/mb303-board-area.jpg

The DAC IC is replaced with a socket for the board to fit into, and 
the three resistors are replaced with leads to the board.
Another 5 leads run to the midi in/out sockets. I'll probably use a 
single 5 pin mini-din, with a Y-lead to full size sockets.
My main purpose in designing this is to allow the simple capture of 
TB303 patterns into P3, though it does also allow the 303 sequencer 
to drive any external synth, and any external sequencer or keyboad 
to drive the 303.
Anyone here interested in a cost price beta version ?
It'll be about 15ukp including postage.

Cheers,
Colin f