Nerdy Gurdy improved shaft nut

The major changes are:
1) Enlarged the flange diameter as much as possible without it contacting the top of the Nerdy Gurdy
2) Removed the radius between the hex section and the flange. Any radius there could prevent the flange from mounting completely flush in the wheel.
3) Added mounting holes for #2 wood screws so it can be installed without glue for easy removal
4) Removed the radius from the edge of the flange surface that contacts the wheel, as the goal is to get as much face contact with the wheel face as possible
5) Revised the center hole diameter to 6.8mm (from 7.0mm) to match the drill spec size for M8-1.25 hole tapping. This ensures we have as much thread material as possible.

IMPORTANT TIPS ABOUT ASSEMBLING A NERDY GURDY 6.3 OR SIMILAR WHEEL

1) If you use the standard kit 3d printed flange bushing you only have a 50% chance of getting a straight wheel. That’s because the radius on the 3d printed flange bushing can interfere with the edges of the hex shaped hol