OMG OMG! I think Stepi has the worst case of newly addicted I've seen in my short career! Even worse than mine!
Let me suggest a pipe mold, 3" diameter x 2' long ABS pipe. It's one of the easiest molds you can get right away and make nice, uniform bars, if big *IF* you like the idea of round bars. My round bars are some of the nicest I've made. You can get this going for less than $10. I'll give you the details if you're interested.