I received the diff internal gears yesterday, this morning I finished reassembling the truck and it's ready to go again for this weekend.
I made a new front skid that houses the Muggy steering bellcrank. I shortened the bellcrank an extra 2.5 mm in order to use a single front skid instead of a doubler one like I had before.
I have been beating the snot out of my LST for the last two days and other than a snapped steering upright (knuckle), everything is running great on 6S. After going over everything, I think the most important change I made is to the ESC's punch control. It was still at the default setting of 0%. It is now at 80%. Thanks for all your input.