Nice workman-ship! It does not look home made at all.
My favorite roof rack design was one I saw in a magazine in late 1999 on the Yokohama Geolander Xterra. I think the article was on a baja offroad race. The rack was mounted on top of the stock rack, and looked like it was made out of square aluminum. Does anyone know what I'm talking about? I did an internet search but didn't find anything.