Quite happy with how that came out!
Used M3 bolts, pro-tip, drill the poly-carbonate first, then mark and drill the aluminium, would have been a lot easier with a drill press!
Overall rating (1 - 10): 10
Would you deal with the trader again (Yes / No): yes
Any other comments: very helpful and communicative, smooth transaction, quick delivery, gun was as described, thanks a lot!
https://www.thepolycarbonatestore.co.uk
these guys will do a 50mm x 300mm 6mm thick polycarbonate for £1.22 I figure i can hacksaw lengths off and have some spare
unfortunately it's £9.95 shipping :(