Worksop setup and gearing

[Robfo]

So ran my 410r at Worksop and the car was quite good but annoyingly unreliable. So i thought i'd ask if there were any solutions to the issues i had.

First round, one of the turnbuckles on the steering popped of while entering the matted section. I'm using the standard 410r turnbuckles and ball ends, are there any other ballcups that fit on the standard durango balls?

Third round, Rear pin that holds the wheel on snapped, would a roll pin be more durable than a solid one?

Also, i'm running an LRP 5.5 with an SXX geared on the standard spur and a 20 pinion. The car is coming of extremely hot, what are other people geared at?