Spool Holder for Lack Enclosure

This is a spool holder I designed for use with the IKEA Lack Enclosure:
https://www.prusaprinters.org/cheap-simple-3d-printer-enclosure/

I wanted something that would allow me to swap out spools quickly and easily, and not have to fidget with rails. I suggest printing this with 50% infill and lying on its side so that the "arm" is aligned with the Z-axis.

Although this print orientation isn't optimal for strength, it should be sufficient to hold up 1 kg spools. I printed with 3 perimeters