Thanks, the PVC pipe really comes in handy, especially on a project like this. And the nice thing is that it comes in a lot of diameters and it's really cheap. A 1", 10' long piece is only a couple of bucks. I used a 10' piece of the smaller diameter and it was less than $4. I've got probably that much in sheet styrene and so my whole grain elevator will run me about $10 when it's finished.