Just picked up these from BNA. Light guard folders for the PE covers on Sherman tank, M10 etc basically any allied armour that has light guards which is all of them and the kit comes with uber thick plastic ones which you you can only cover so many with a German helmet.
Shows they are used with Passion Models who sell a set just for the guards but should see no reason why not with other PE options as well.
It's hardly being a pirate, if you want to blow all your money on stuff like that, that's your choice. It's only piracy if I copy them. I won't I'm just using the concept which the last time I looked you can't patent or copyright any more than you can an idea.
I bought a 3D printer and I'll be making my own designs because I can.
I wasn't looking to market them just make them for myself, as I'm making them I can ensure that they are the correct scale.
To be honest I don't really make enough of the same type of vehicle to be worth the effort, "looks about right" has always served me well enough.
Having one for making grab rails would be a different story though.