This version uses a traditional aluminum block with four threaded holes. I like the idea of four holes so the skater would have some redundancy if a threaded hole ever fails. I am clearly paranoid about stripping threads but I actually think doing so is relatively rare. The block is also wide so it will allow for wide range of frame adjustment and stiffen the boot quite a bit in the mounting area. The blocks are also asymmetric such that the front block hangs back and has a horse shoe shape to stiffen the critical area where the second wheel comes close to the boot. The rear block is more traditional. The idea is that this block would allow for a boot design that brings the foot very close to the second wheel and not suffer from problems with sag leading to the wheel rubbing the carbon.
I also plan to machine the blocks from the top and the bottom to reduce weight by carving out some of the excess material from the block.
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