How is this anything like the apple-window's anecdote? Seriously, this is a trowel. Not exactly the kind of design that sees radical change very often. If anything, the trowel that Bill made (in the referenced thread, did he make others?) is much more of a copy/ripoff than this one. It uses thinner titanium and then had some extra engineering for strength. Hardly unique in either regard. I find it ironic that you made the comment that you did Bill. How is your design any less of a "Bill Gates" move?
Roger's trowel, much like Bills, uses some engineering to overcome an issue that Roger saw with the handles of current titanium trowels. His solution, in my opinion, probably works better than what Bill did. I think it would be more comfortable to hold and much less likely to twist or crease. I think using the same physics behind the design of shovels is a neat idea and that it was well implemented. I really don't get how this trowel is more of a copy than what anyone else has done. Is it because he used hose clamps for shaping like Eric did? Eric's trowel in that same thread is a complete rip off of the montbell design so yeah..
If anything, I like the PVC trowel in the referenced thread. I think I might make one of those! Thanks Red!