another burn out :(

[autonm]

Ran my Cat SX2 first time tonight at the club. 1st race fine - steering needed tuning as expected.

2nd race it all went wrong. All of a sudden a grinding noise and car stopped.

The U3345/6/7 Gear CNC Idler in step 5 (of the manual) is melted to bits. Having read the previous post's about the burning of the slipper I was expecting that to go - but for some reason it was the other side to the slipper.



Any ideas why this side melted? Did I have the nut to tight or to slack on the spring side? I dont believe I had it to slack as I had about 4-5mm of the thread showing.

Any ideas - as yes I can easily replace it, but what do I change to stop it from happening again?

Thanks