Simple Extruder Drive Block only 3 parts!!

UPDATE 7/27:Enlarged holes for push fittings on extruder body and holes on the arm for bowden tube if used. Enlarged volume above filament/push fittings for extra strength. Enlarged "footprint" around foot/cleat mounting holes on the body.
UPDATE: Created space for MK8 grub screw, added support for overhand on drive block. Added slightly more space for bearing clearance. Added indent on both sides of arm so only a 20mm M3 bolt is required. Created slight spacing for 608 bearing on arm.
Whi