1. This is a mandatory upgrade to insure getting quality prints from an Ender 3 Pro. It will require some special "upgrades" to print:

• You should upgrade to dual diesel powered extruder motors.
• Printing with a 5.0 nozzle at 800mm/sec is advised.
• The flapper works best when printed from cast iron.
• Level your bed (waiting until your significant other gets out of it is a good idea).

Creality

Ender 3 Pro

No

Yes

200

10

There will be lots of supports. Some are trapped and will be tough to get out. I used needle nose pliers and a small wood chisel and they came out without tearing up the print.

Use a piece of filament for the hinge on the flapper. There should be enough clearance to provide some grip so it stays open. If not just super-glue it in place.