I am not a lawyer, but I was under the impression that as long as you did all the work that someone could look over your shoulder to advise you.
I could be wrong but since 80% lowers go on sale occasionally just buy an extra when you buy the jig - if you mess up the first one just use it as a paperweight.
I could be wrong but since 80% lowers go on sale occasionally just buy an extra when you buy the jig - if you mess up the first one just use it as a paperweight.