Classicfur,
At the end of that mantis tiller vid it did mention that the blades are covered with lifetime warranty.
Jayco,
I have some areas with heavy clay soils too, but they do all seem to have a inch or so of decent top soil (that lose leaf mulch/composted area). I am not really interested in something like the mantis for deep tilling, but more for something to just loosen up the top 1-2\" so I can plant some seng seed.
In my garden I might use it for weeding around my corn and stuff you know between the rows, just to wipe out the young weed sprouts that are appearing. Looks like it might work well enough for that.
It also looks like you could run it with only one blade on (normally has a blade on the left and another on the right). If you removed one blade and only used one, that would focus the digging power in a smaller more narrow area and you might get more depth done that way - again all I want is 1-2 inches.
Also as a comparison - the tool that Classicfur is using is a garden weasel type tool - a hand took with cris/cross type blades. I bought one a couple weeks ago (image below) and have used it on some smaller areas (like 4' x 10\") and it worked well enough, but did take quite a bit of time to get that entire area worked up to a depth of about 1\". Then I had to poke the seeds by hand down in the dirt to get them down where I really wanted them.
Anyway - compared to the garden weasel type device, how would you rate the mantis tiller type tool ?
Thanks
TNhunter