Has anyone fitted the irmy backbox to a car with vxr type lower skirt as fitted to xp models. Just had one fitted but there is a big gap between the tailpipes and the hole that had to be cut out in the standard sri insert. Cannot put box any higher as it would foul on bumper/chassis bracket thing. I know your meant to buy the irmy insert but i don't think that would fit with the vxr skirt...