I realise I'm 8 months late for this discussion, but I have to put my 2 bit's worth into this highly learned discussion. Now a word of advice... Nobody should buy, or try to use any product with the name Acme associated with it! End of story. Wylie Coyote always gets Acme products & I'm here to tell you that a bit of Z end wobble is the least of your problems. Every use by our friend Wylie, of an Acme product, ends in a spectacular failure. Get with the strength & go Trapezoidal, it has a much classier ring to it! I'm sure that "beep beep" in Roadrunner lingo, is Trapezoidal. So can we put that one to bed?
