Good point, I never thought about building wheels on it I usually do that in the frame but this will work well.Nice work Dan!
That is a handy tool.
I built a similar one years ago and it's still in service and working fine. It's handy as hell for building wheels too. All you need is to clamp a stiff piece of wire (tig rod) to one of the side supports to use as an indicator for truing rims. Or, if you have one, you can get real fancy and use a dial indicator with a magnetic base.