After several years the plastic wall mount on our Holman Hose Real Broke (snapped at top and bent over).

This reel: https://www.holmanindustries.com.au/product/20m-retractable-hose-reel/

These things weigh a lot, especially when full of water, so this now has a 200x200 25x3.5 right angle metal shelf bracket embedded in it to aid support.

NOTE: The part split in two (use split-to-objects) so each can be placed to maximise filament direction. Place on plate as per image.

3MF File was from Bambulabs so may have features incompatible with other slicers.

Minimal supports are needed and I found them easy to remove.

I printed in PETG, 6 outer walls and 45% infill. I'm fairly confident it will last at least as long as the purchased one.