@zeHamish i cant claim the base code as my own - i used this guys as a starting point. http://code.spells.dk/Guides.cshtml?Page=Arduino_ASCU_V1 - the main difference is i used a digital trigger read while he used analogue. And i used a pot for the fire select, so that was an analogue input instead of his digital read
Cheers, the cutout is still way to low for my build. I took the blaster out on sunday for an all day event and the gen 9 mag with my dodgy cut worked well. There are a few small mods needed on the lower reciver but overall the design works.