Too bad, but I guess that's what I expected.I cut about 0.4" off the height of the TDC. Now sits about 0.58" tall. Bad news though: it's unbelievably expensive to make so I doubt anyone will actually be interested besides myself. Costs about $220 including the bits from McMaster. Would come down a little with some volume, but not enough to be worthwhile. I'll have one set made for myself, but that's probably gonna be it.
I guess I should say that this is all machined aluminum costs. Printing is less than 1/3 of that through Shapeways, so that's probably the best option.
But, the arm you made should be a decent alternative with a regular TDC.
How does the arm work anyways compared to a nub or the TDC?