I've been working slowly on getting the mods done to the helmet. I've got a few done already, and am about halfway through doing them. I was going to just layer up the card around the cut out parts to make them solid, but then realised just how long that would take to do! Instead, I've ended up using corrugated cardboard to provide the depth, coated with superglue on the inside to help stiffen it. Hopefully by next weekend I'll be ready to add a layer of resin and the fibreglass to the inside. After that, I'll use bondo to provide the rest of the details I need.