This is an under ALP cabinet mount you can use with the Bluetooth 2.1 Amp ZK-TB21.
Like the original file, supports are needed for the flanges but the rest didn't need supports. I have painted these on in the 3mf like the original designer.
I printed in PETG with 30-40% infill. The double mount needed to be turned and I had to turn off the skirt to make it fit my MK3S+
Supports: Yes (support enforcers only)
Infill: 30-40%
The author remixed this model.
I added some depth to the mounting points so that it would clear the edge of the cabinet. I also made a double version to mount two amps side-by-side.