I'm about to embark on rewiring an RB301 and have been trying to find any guidance here on AK - but haven't been successful. Is there a diagram around? Specifically I'm wondering about the rubber plug at the cartridge end of the arm - does it snap out? It appears that the internal wires are small gauge than the wires protruding from the cartridge end, with the tags on them. If anyone has guidance or can point me to a thread I would greatly appreciate it