So, I have a lead on some preamps that are new old stock. Date of manufacture is 10-15 years ago. They are in the oem boxes, untouched, never used, never plugged in. My concern..... The caps have never had a charge up. My basic understanding is that if an ecap sits for years on end without a charge, they go bad. The pots have never been turned back and forth. Could pots sitting for this long with no "excersice" go bad and get all scratchy?