i'd guess your reason for protecting your XDFs are just so commercial guys don't come along and try to profit by your work?

i just hope you have a plan for when you get bored/disinterested/dead, so your hard work can continue in the hands of others, especially when the vehicles it covers slip into obscurity. i see a lot of really good tools that become obsolete and then have to be recreated from the ground up, which is a total waste in every way.