The leg is 20mm tall, the screw goes from the inside of the case through the leg hole and pokes out of the outside so the leg can be screwed on.
No re-scaling needed.
This should work for almost all cases, the leg needs to be the same height as the others though, otherwise you will get a wobble. If you need it to be a different length, please remix it yourself. If you cannot, leave a request for me to do it in the comments with the height for the leg needed.
Printed on my CR-10 in an hour. (Both screw and leg in one print at 60mm/s)
Note that the Philips screw indent doesnt work great although it does work a little, its really just there. You should be screwing this with your finger if possible
How to print:
•Please rotate both models 180 degrees in your slicer
•20% infill or less for the foot with .4mm thick walls.
•Screw should be 100% infill, but like 10% infill works too. So long as you have .4mm thick walls or thicker.