Prusa i3 6mmx50mm Frame Filament Spool Mount

I was designing my own filament spool holder to mount it on top of my printer, and after printing the "core" I was trying to design some arms to hold them in place, and after coming out with a few designs, I wasn't happy with how it was looking so I started searching around. I found the ones made by sexzual and they would fit my spool so I decided to print one to see how it would work. Sad thing, the top of my frame is 50mm long, so even with the biggest M3 screws I have around (25mm), I couldn'