So I haven't updated this in a while. The rear home made fender flares came out like junk. But I'm not looking to win beauty contests.
Actually, I think the idea was not bad. Instead of just cutting the fender, I folded it out, covered it with fibre glass and made them wider. Very bumpy fibre glass. Oh well, I can add more glass or putty to make them smooth. But for now, I took that rubber stuff you put on the base of walls, and bolted it down with stainless bolts. Not pretty, but makes me street legal.