So I'm pairing down on kit considerably, which also means that I don't have much backup equipment. From what I understand about the JVM, as it is PCB based (there are 3 PCBs in total), it is often easier/cheaper to replace the board than to pay a tech to repair it. Does this sound right? And how is the availability of spare parts? As I plan to keep this amp for the long haul, I am considering picking up a spare of the 3 boards.