A modified spool design, originally coming from user dstewartrobots. This was modified for FTC Team 3736 (Serious Business) with a few notable improvements:

1. This model features 8mm sunk screw heads on the top and bottom. That way, a normal tetrix long screw can fit all the way through, and leave enough room for it to screw into parts on the other side.

2. It includes two integrated holes for putting medium sized screws through, and allows them to be drilled into the flat part of a bar.

3. It includes a little hole where you can put the string through, for your convenience. c: