External bearing bottom bracket tool

Modified FatGeekyMan's tool a bit to have more round corners. Also added a modifier part to add stiffness to teeth and handle while using a low density infill to reduce overall filament usage.

External bearing bottom bracket wrench compatible with:

• Shimano Hollowtech II
• Campagnolo Ulta-Torque and Power Torque
• Race Face
• FSA
• SRAM
• Truvativ

Slicing using Slic3r's modifier part feature: https://youtu.be/kdgvXvhe9ms