Lock I have purchased, initially, always be circling between seatpost with bicycle body. The metal part of the lock is always knocking on my bike frame while on the road and the paint being damaged. So the idea is to move the lock to the back under the saddle.
I use the four hexagonal socket screws with a length of 20mm diameter 3mm, 4 washers and nylock nuts 4 pieces. Layer height 0.3mm, infill 100%.