Looks like I also need to buy new switches for my Matrix 12, a few of the buttons are completely dead and attempts to clean them are not working. The little removable rubber membranes inside are damaged (rotted). Does anyone know where I can buy some replacement switches? I checked http://www.vintageplanet.nl/ but he does not seem to have any, nor does ebay.
Message
Matrix-12 / Xpander - switches replacement?
2010-07-13 by mirror_saw7778