Then there's this one that has 3 casters. Might be better for my rougher drive way.
Bought one of these today at Langford Home Depot. Although a bit tedious removes the thick moss really well. Does a nice job on the thin and dirty pavement. Biggest problem is the driveway surface is very rough and not even and so it's easy to see that the two spinning nozzles have some wear marks on them from touching.
I still have to use the wand to push away the chunks of moss but this was way cheaper than hiring someone to do this and way easier than holding onto a wand for 3 hours. Have to move vehicles around to finish but that area has much less moss.
Oh and what an experience at that HD. More staff it seemed than customers in the store. Ask a question and they answer with very little information or help and go back to talking to their co-workers. I asked about 1/2" OD copper connectors and was waved to the next isle with the statement we don't have much there. Not a question about what I wanted to connect. So I bought one more compression nut and fitting for 1/2" pipe that I think will fit in the filter that comes tomorrow. And interestingly this was the 90 degree taper, not 72 degree taper but for about $4 solid brass.