Tevo Tarantula loop-under drag chain

Stumbled across Wanmuhammadarief's drag chain and I really liked the looped-under style, but it's setup for a Black Widow and won't work on the Tarantula.

So using the drag_chain_u_shape_holder from their project as a basis, I tweaked the supports to work for my spider, then designed some end mounts.

Designed to work with a standard X carriage setup and a 10x20 drag chain. Should work with a vertical carriage, but you'd need to design a new support to connect cable to the vertical X carria