After checking Piezo for a dead A string, checking on Workbench that the string volume is set to max, switched piezo's over in the trem wiring, checked continuity from the A string piezo to the DSP board, I've concluded that I have a dead channel. Any tips on finding replacement electronics/DSP board? I could keep a lookout for a damaged Variax that needs repair, so I'll do an eBay search. Any other ideas?