The Grom killer that never was- what can I even upgrade?

[nepbug]

Where did you end up getting the knuckles from? Have you found any drawbacks to them?

 

[Glitch]

Where did you end up getting the knuckles from? Have you found any drawbacks to them?

Bought them from here. https://www.aliexpress.us/item/3256...t_main.69.21ef18029npf0u&gatewayAdapt=glo2usa

Yes, there is a drawback but TBH I think all of them would have this issue.

The very end of both the upper and lower arms rubs on the inside of the hub. The only thing required to fix this is so low grit (I used 240 I think) sandpaper. Just sand, test, sand, test, until they move smoothly. Once I did that they work great, no binding and the screws are staying tight with loctite.

Also, to remove binding in arms and links on these cars, just squeeze the end of the link with the pillow ball inside with some needle nose pliers. It's magical. The harder you squeeze the more binding it removes. It doesn't introduce any play.