+1have had mine for 6 months now. I did the same with the plywood under the side stand to make it more verticle. Additionally, I bolted a piece of angle iron perpendicular to the long rail and have eye bolts on each end. from these I strap the driver's pegs for more stability when rolling. Probably overbuilt but that is my nature. I found mine rolls easily when I push with my foot on the dolly instead of pulling or pushing on the bike on the dolly.
A word of caution to those wanting to order over the internet. The price may be right but if you get one, as I did, w/o all the parts you're pretty much hosed. There is dealing with the offshore customer support, the backorder, the months of delays and the misleading promises I received. I finally found a helpful HF store employee that gave me a piece off one of their in-store dollies so I could complete the assembly. He then worked with HF to get his missing piece replaced. The missing pieces were the connecting plates that join the two halves of the rails. I was almost to the point of having pieces fab'ed at some shop then this helpful guy came through.
I'd have driven the several miles to the store to buy one but my wife bought it for me over the internet and it was delivered a few days before Xmas, '08 w/o the connecting plates. I dealt with them over the phone for literally months until the store employee helped me out in April or May, I forget. Alls well that ends well and I like the product. The price was on sale at $99.