Hi Martin. Sounds a good idea to me , your side hatches . All I would add though , to your above comment , is that you say these hatches cut down on fire distortion and damage to paintwork , and that little mess is involved . Well , I know that welding is eliminated from the equation , but the side hatch aperture will likely be cut out with a grinder won't it , which is a far from clean process , and with a sizeable fire risk . Only other options are using a jigsaw ( laborious ) or plasma cutter ( not a diy option , also a sizeable fire risk ) Not trying to pick holes in it, it honestly sounds good , just wanted to point these things out .