Thanks Brad. I saw it had a front brake. I just thought it would work better with dual rear brakes. Side pull during braking would happen if the dual rear brakes didn't happen equally. I just got the plans and was reading through them.
On some of the other deltas, I went with a dual rear disc, but there is no real difference in the feel of braking with the single rear and a front.
Hope to see photos of your build here soon!