Mark 7 case feeder fix STL file is here https://www.thingiverse.com/thing:3173334 andrewtac: Almost any printer will do, mine is a Malyan M200 which cost less than 200€ a couple of years ago. It has only 12x12x12cm printing area which fits most things but forget printing darth vader helmets or such.
Malyan was so cheap they even misspelled their slogan on the side of the machine.
"Realizing possibilty" ... instead of possibility.