The #1 reason I changed the tamiya plug to a deans plug. The tamiya plugs are trash and the connector wires get loose.
I noticed the r/c battery packs were not lasting as long as they should have been. I was using 4200 r/c battery packs that should have been running for at least 8 hours. I had one entire unit get fried because of this connector issue. Luckily it was still under warranty and got a replacement from fostex.
Deans plugs are used in r/c car racing mostly. They are a smaller plug in connector which allows the battery pack and
connector fit in the compartment much much easier. You can close the battery cover with no probs. They were simple to solder on and a very cheap upgrade. I definitely recommend doing a connector swap. No problems ever since I did.