Prusa i3 MK3 Biohazard Extruder Visualiser

UPDATE 28/08/2018: I noticed a couple of peoples makes weren't centralised so Ive changed the diameter of the rod in the biohazard file to 7.48 mm with the same hole for a 4 mm x 2 mm magnet, I've also made the hole on the bottom side of it 7.48 mm and added a ring in the centre of the gas mask files to help align properly when gluing. Ive made a smaller biohazard part that should fit OK with the r3 extruder body and 45 deg. fan. This still looks good with the 100 scale gas mask but Ive made a s