Midea Duo Office Chair Wheel Adapter (Use new and slightly longer screws) (might work on other models)

This works for the Midea Duo (Original Manufacturer) as well as the Whynter, Toshiba, Danby, Cooper&hunter,  Dreo Twinco

Dont use the screws that were holding the wheels originally, they will not be long enough to get a good grip to hold the weight of the air conditioner. I personally used m4x20 which seems to work just fine (Though they do seem slightly too long)

DO NOT OVERTIGHTEN. Its very easy to overtighten these wheels. Stop once the screw bottoms out and the model stops wiggling. 

Use PETG or ABS and print with either solid infill or lots of gyroid infill and at least 8+ wall count thickness.

If you buy wheels with locks, you might have clearance issues with the locks hitting the underside of the unit. I did with one set I bought and just drilled out the locks on 2/4 of the wheels to fix the issue.