A self designed fillament roll holder, always procrastinated uploading it, it has been on my printer for atleast 2 months now. It works perfect, allows enough movement for the fillament roll and the thicker part at the end keeps it in place. It is designed for the 750 gram PLA rolls.
I printed it at 0.2 mm resolution and 50% infill. It is connected to the open beam with 3 M3*8 bolts and nuts.
NOTE: print it standing up on the side that will be attached to the beam