Replicator 2 Drive Arm Modification

This is a remix 'Spring-loaded Replicator 2 Drive Arm for a 3mm bearing'. I was having sporadic issues with filament slightly thinner than average slipping off of the bearing. The only change to the original design is to remove a slight cone at the bottom of the bearing shaft so that the bearing sat further towards the drive block. It will increase friction on the bearing, but it has solved my issue.