Thanks, but from your references of #11 & 20 thats the rear of the truck that's not even a T4.1. or to do with the front alum bulkhead. The tower hobbies do use the sizes you gave me, but I think AE information and part # is what Im going to use. I was not trying to debate you or try to say you are wrong just guide the next person who might ask this question to a part# to make it easier on them.