Original Model lacked a way to lock the two pieces together which made it super annoying to get the spool in because one side would fall over or not align properly. I added the center screw so that it can lock and slide in as one piece which I have tested and it is amazing to not worry.

Found out last night that my cable chain holder at the back of my Q1 Pro was broken because the chain was sagging hard. If you look at the original piece, one of the clip ends is bending inward. Asked Qidi for a file but they didn't understand my request so I made it myself.