Home Brew Z Axis Support for MPSM V2

I ordered some 8mm parts from Banggood to build a Z axis support for my MPSM, but I couldn't wait to give it a try, so I cobbled together this thing from printed parts, except for one piece, the vertical rod. I happened to see some fiberglass arrows in a store and thought they looked to be about 8mm. I was right. They're really close. I bought one for $2 and printed the rest. If you decide to go this route, make sure the arrow you select is 8mm or very close to it. You may have to adjust the siz