Well I reckon there might be space, or you could make some... Miduino can run off a PP3 so you could make a self contained controller. If you are prepared to rip the guts out of the stylophone (leaving the keypad and resistors) you could add other controls like pitchbend/mod knobs etc using the same microcontroller board to manage them (see bottom of page at http://sites.google.com/site/skriyl/Home/midi-sty...

:( well I only created the clip to illustrate a forum post on another site (kompoz)... never expected anyone to find it on youtube... then wondered where all the hits were coming from! I added the instructions at http://sites.google.com/site/skriyl/ later on.. since I actually feel the same way as you about interesting clips with lack of any info!
well I hope the instructions are helpful - all feedback welcome. cheers, jason