Andrew,

Ive got mine mounted to the horizontal bar between the rear arms. Interesting to see the slight differences in cages between L18's and mine. My rear arms are welded to the floor inbetween the wheel arches. I love how clean that interior is, mine is white too but it needs a lick of paint, would love to have it looking like L18's but its just going to get dust and crap all over it!

Cheers,
Simon