No problem Guys. I confirmed today the material that will be used is 5083.
Nigel, with the numbers here I'll get one cut, but some one who is after just one might grab your spare?
Luke, 14mm should be fine, I've only ever used and known 16mm spacers to be used, and seen good power with them so just sticking with what I have used.
Fehlbie, Aquacut at Ingleburn is doing the job. Lasermade were one of the dearest ones for these too, Im pretty sure they were quoting $250 a piece. Do you have drawings? I can drop them in for a quote. I also have your K&N filter:)
I've got to pay for them when I place the order so if you guys can shoot me a pm I will reply with my account details.
Cheers,
Phil.