yeah, side bracket by the airbox fits anyway, but need to redrill the holes in the back for the rear support.
For belt and braces, you'd ideally make a bracket to pick up on the bottom, or do like on escort and have a spacer tube and fix to the inner wing, but i've only mounted mine at the back and front on the two points and seems fine..
although i miscalculated when i drilled the back holes and got it too close to the downpipe, now it's got a small hole burnt in.. doh
Mine's in pieces at the mo, so i'll try and get some pics of the rear bracket mounting..