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Today I upgraded the bike mount for Endo. I reworked the two screw holes and the seat for the nylon lock nut. So far it looks pretty cool.
Here is the original GoPro mount I modified in 123D. I customized it with certain settings that fit my bike and the screws/nuts I had in my bike box:http://www.thingiverse.com/thing:1655892
I then removed the GoPro bits, extended the base 4mm, and put a 3mm hole in the center for the screw that holds Endo in place.
You can find the updated bike mount files in my github repo:
Feel free to download, modify, and make them better.
If you end up making one send me a pic.