Review on 🖨️ Bigtreetech Ender3Pro Filament Extruder by Jerry Frey

I chose this one in particular because of the connectors on both sides as I want to add a smart filament sensor and ensure the filament path to the extruder. First I have to do a trick to avoid grinding the aluminum, so I filed the gear into the arm to mount the washer and my problems started. Once assembled, they replaced the original. It was impossible to align the gears because the file it had to accommodate washers (I only used the lower one to avoid too many modifications), then gave up aligning and one and the connectors (the ones on the "outside") broke, I got a spare but couldn't get the profile piece left inside out. So called failed mission and I ordered another option and since it arrived it has been working great. I wanted to make an explanation but it wasn't possible, it would be nice to at least have it as a backup. I still like to connect the inlet port to a smart filament sensor or a piece of tubing from the spool to avoid contact with the lead screw. Very disappointed and I don't think it's the user's fault, the next day my replacement works with no problems; but maybe i did something wrong.