This is a part I put together for a friend to replace a broken "flyer" on her wheel. I included the Sketchup file so you can remove and or replace the initials I stuck on the hub. I printed this at 50% and 0.27mm layer height on my Rep2 in both PLA and cherry wood fiber. The wood fiber works well, but I have noticed that it takes a few hours for the wooden part to fully harden. This is actually helpful, as it allows the hole through the hub to adjust around the axle when you slide it on, making a custom fit.