JC's are similar to Proline's. I wonder if we are getting the same amount of steering throw? When at full lock, the arm on the steering knuckle is touching the C-hub. My rims were rubbing the inside end of the arm at the nipple for the hinge pin! Both are LPR half offset and you can see the black rub-line around the hex. Even the stock wheels rubbed. The only way I found to avoid this was either to have less steering or to extend the hubs! You might not be getting the max out of your steering or you have rubbed the corner end of the arm down without realizing! I shall slap on a pair PLHO's with the HoBao standard wheel hex's tomorrow to be certain.

This has more steering than my 8ight buggy!!!