BCAR hardware-free dùng ren “ex” (threaded)

I took the threads from the ex bcar and grafted them onto Leedle's hardware-free bcar. Then I cut it in half. Compatible with the pins and rollers of the original hardware-free bcar, as well as any mounting system that uses the original (not Rev 2) ex bcar threads.

EDIT 08/30/24: Narrowed the opening within the threads to get rid of unnecessary space and reduce drag.