Printing Instructions
No support needed in the nut hole on the bottom. For settings I would reccomend using a good amount of walls - I've used four. And .2 layer height so there is enough detail for the top interface.
Hardware
For either version you will need 3 M6 nuts and screws to hold it to the QLS plate or UBL.
SHM V10
Standard version, you can use a 10mm m6 cap head screw. (Should petrude out the front into the holster about 4.5mm so screw may need to be shortened slightly.)
SHM V10 Countersunk
Countersunk version, you can use a 15mm countersunk m6 screw (should petrude out the front into the holster about 4.5mm so screw may need to be shortened slightly). This should be much stronger than the standard version as there is much more plastic along the layers.