Demoed the 21" lawn solution aerator today. It had a 5.5hp Honda engine with single hydro selling for $3,499.00. This machine is new to the place I demoed it at so they didn't know much about it and didn't have an owner's manual. I was hoping someone on here could answer a couple of questions. 1. Is there a way to adjust the depth of the plugs pulled. We didn't see anyway to adjust it and it was pulling about 2" plugs. 2. They are selling with only 1 weight and the two additional weights are options. Anybody know how much they run. As for the demo, the engine ran good once we got it going. The ease of operation of this aerator is amazing. There is no comparing it to the rental units around here (bluebird). It will cut the time to aerate in half and not leave you beat at the end of the day. The only draw back I saw was in the transport mode. This part was not the best. I think having the hydro on the rear wheels would eliminate that problem. I will definitely be purchasing an aerator, but not sure about the price. Turfco's got identical machine except bigger 24" and are running a 10% discount through April $2,995.00. The problem with that is nobody around here sells them and they are factory direct. Maybe going with the dual hydro 24" for around $4,200.00 might make more sense in the long run. Anybody have any thoughts on that or answers to the above questions.