Dave Smith Instruments SYNTHESIZERS

Hi Guys,  My Evolver(original) has been pretty reliable for the past 
two years. When I fist got it one of the encoders on it went but 
Dave sent me a new one and I replaced it. Also, I had it 
unplugged one time for about two or three weeks. When I 
plugged it back in all the patches were gone. I told Dave about it 
and he sent me a replacement chip. I haven't had any problems 
since, but then again I haven't had it unplugged since then! This 
is my worry. I'm doing three live shows in the next month and the 
Evo plays a central role. If I went there and plugged it in and the 
patches were gone I'd be so screwed. Does anybody have 
experience with unplugging their Evo and the patches aren't 
there? I have saved the patches to a document on my hard drive 
but I'd be freaking out if right before a gig I had to reinstall 
everything. So, has that been a issue with anyone else?

steve