Extended Arms (customizable)

I didn't see this remix https://www.thingiverse.com/thing:1649711 so I created my own in onshape. I imported QuadFramesUK's step file into onshape and recreated it with variables. You'll want to edit gapsize and hookdepth on the left pane to your desired dimensions. After changing those values the part will updated.

OnShape Link:
https://cad.onshape.com/documents/0fd76ae41c89726cee7d077c/w/a77a7817adfac143e457b1f6/e/85019f3de37a1d31d7b40740