Update: I took the gearboxes out (lurkingknight was right, the echo1 P90 gearboxes come out through the buttplate),
The first problem, with the automatic fire, is just the trigger pull length. It's a simple fix - najohn's tape suggestion should work.
As for the second problem, I didn't notice anything wrong with the wires. I still haven't had time to sit down and actually take apart the mechbox. From what I've read it's a v6 mechbox, so I'll have to sit down with a youtube video, and invest an evening of time into it.
Thanks everyone!
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