As pictured, the purpose for this item was to create a LEGO-based Pi Camera mount that could be attached to a MakerBeam rail.
Adaptor for LEGO brick attaches to small MakerBeam rail (https://www.makerbeam.com/makerbeam/beams/). The Pi Camera mount will accept a 1x2 "gimbal" LEGO piece (I think I got some from a LEGO store, but also found here - https://www.ebay.com/itm/LEGO-Plate-1-x-2-with-Small-Towball-Socket-on-Side-Towball-on-Side-4-sets or https://www.ebay.com/itm/NEW-10-PAIRS-Lego-DARK-Gray-Plate-1x2-TOWBALL-Side-1x2-Gray-Plate-BALL-SOCKET-/ - web search = 'small towball and socket lego')
Printed parts on a Printrbot Simple Maker 1405, "standard" settings. I had to trim a bit and press firmly to get the real Lego brick to attach, but once pressed into place, sit firmly, which is all I need. I'm sure if I used my Prusa i3MK2, would have been a better fit and easier to remove/replace bricks. Similar for the camera mount - a bit tight, but just used x-acto and a little heat to help the fit the 1x2 LEGO - glue/epoxy would also work fine. I will update the model when I have time.
To attach the Pi Camera (designed for v2, but should hold v1, too), >=5mm M2 screws can be used.