well i had to take some material out of the arm towards the back to be able to get the exact wheelbase and i also had to ream out the arm to be able to use the E4 caster block. Then I added the shims shown on the picture to allign every thing as the E4 arm. I also had to use a shorter cvd bone 46mm to fit. I havent ran it yet I really dont know the benefit , like i sai i got cought in a jam over the weekend (broke and arm and had no replacement) so i had to do this modification but i ended up just gluing the arm and adding some papertowel (like fiberglass body work on a car).


I have no idea about the outcome i just needed something to finish the race for the weekend