Geeetech Prusa i3 Spool Holder/hanger

I liked the original design but I wanted something a little more secure so I used tinkercad to modify the original so that I could use the original PVC tube that came with my printer. I added a wing on the back of each bracket and adjusted the rod holder to suit. I bolted it to the acrylic frame with some M3 bolts I had lying around, I think from memory they were about 15mm but anything longer will work also.
The trick is to space the brackets to the length of the original spool holder tube s