I wanted to rack mount my reolink RLN8-410 NVR and found the original model lacking in some areas and the dimensions were off from my exact unit (Purchased Nov. 2024). So I recreated the original footprint, resized and made it a single model that can be printed twice, used for both left and right sides, and with a bit of adjustment. You can have the unit sit almost flush with the panel or have it stick it's nose out.
I included the model info reported from my NVR, since they've made revisions to the hardware but retained the same model numbers.
Print twice and you'll need M3x10mm screws to replace the original screws on the sides of the unit.
I printed in ASA for some strength and help with warping from the unit getting warm.
I also had to remove the rubber feet from the bottom of my unit and its still just a bit taller than 1U.
The author remixed this model.
Recreated the initial footprint and reworked it to be a single model that fits either side with some adjustment.