Cat 777D Mining Truck

[JensR]

I have used Tamiya shoulder bolts for their kingpins with some success.
Their thread is M4 and about 5mm long - maybe not enough for you?
If interested, check parts# Tamiya 50100 and 84175.

For the limit switches, maybe keep in mind that you can have the switch either actuated by the sliding "nut" or the dump box.

Battery: Sorry, cannot really help. I'm still using my old NiMH packs and have neither made the switch to LiPos nor bought new packs in ages.

Cheers
Jens