I'm sure the length of the connecting pins DOES matter. Any time you are dealing with signal wires in close proximity to potentially "noisy" wires, you want to keep those low-level wires as short as possible.
How can I get the pcbs out from aluminum case without braking something. Two plastic covers are removed now but the bottom pad is attached to aluminum case very tight and there is not much room for a screwdriver. Any hints, please?