Magnetic c9.25/hyperstar tribahtinov mask

Do you have a C9.25 with a hyperstar camera, and get tired of having to wiggle your bahtinov mask around to get collimation and focusing sorted? Look no further! This tribahtinov mask splits in two parts and is held together with a 2-part magnetic retaining ring so you can easily fit it on and take it off without interacting with your camera!

fixing the mask is easy, just attach magnetic ring perpendicular to the bathinov mask parts. Ensure that the two halves of the mask are clipped together to prevent any light leaks, and you're good to go. There are two small notches to mark the alignment points for your collimation screws. 

When not in use, the parts collapse onto eachother and are held together by the magnets for easy transportation. 

To assemble this, you require 40 6mmx1.6mm round magnets. Could it be done with less magnets? Possibly, but magnets are cheap and i wanted to ensure a solid fit. The magnets should just snap in, if not you can use some superglue.