I have the BudBuilt dual crossmember and a R10 case and its complex to say the least the rear case isnt supported due to the fact there isnt any way to mount it UNLESS YOU MAKE ONE LIKE I DID I got a stock mount and cut the top and bottom parts away from the rubber part and used the top half to mount to the case (like normal) and then I got a piece of flat bar that is thick enough to slide under the top mount and the BB skid plate and tacked it together then had finish welding outside and it was all boxed in
pix to come soon