I just bought a Mantis with Honda engine. I bought the dethatch and aerator tines also. I think the dealers don't want to sell Mantis because Mantis offer an iresistalbe deal if buy direct from them. I order direct from Mantis. I choose Mantis over Honda FG110 because the gear ratio of Mantis is 42:1 vs 35:1 of Honda. The tine should spin slower and I think it would be better for dethatching and easier on the engine.
I choose Mantis over Stihl Yard Boss because I can't get over the HomeScraper engine. If Stihl would have put the FS80 engine, I would have no reservation buying it. Stihl have the nylon brush I really like. Why Stihl put a homeowner engine on the Yard Boss is beyond me. It is the same engine that is on the trimmer that is selling for $150 in the dealer.
I bought the one with Honda engine anyway.
Anyone use the dethatcher tine on the Mantis?