That's an excellent suggestion snefroe1 ;)
Since I want only one arc, I'll modify it sometimes. I'm not sure I have the piece you're taking about, but "I'm sure a solution will present itself" ;)
BTW I just finished the turbo tank, it really rocks ;) However, it also need certain modifications at the axel where the wheels are, I have a sense of unfinished business here ;)
I'll post some pics later (isn't weird that I am nearly the only one here posting pics *wacko* )