Solved // Solution guide. Now the loudest part is the AMS unloading filament!
Remove spring and ball, replace with magnets. Credit goes to this post https://www.facebook.com/groups/603696475392327/posts/921169733644998/
Guide is for the Left Stopper Cutter on H2C (change location of one 3x1mm magnet for right side stopper), similar for H2D - H2S reassembly may be different. As always turn off and unplug your printer. Not responsible for damage, injury, warranty issues, etc.
Tools with need 2 and 1.5 hex bits, super glue and a 3mm hand drill. I used Bambu lab one Hand Drill Kit | Bambu Lab US Store
Parts 2 3x1mm magnet and 1 4x5mm magnet (stack 2 4x2mm plus 4x1mm or stack 5 4x1mm magnets) per stopper. I used 390PCS Small Strong Magnets in 6 Different Sizes,Neodymium Disc Magnets Heavy Duty,Rare Earth Magnet Small Round Magnet for Industrial: Amazon.com: Industrial & Scientific
Install magnets and check if they are flush and polarity are correct before using glue. Install the 3x1mm magnets using 3mm hand drill, go slowly the plastic is thin and can easily drill right through. Drill a little at a time and repeatedly check for flushness.
Reassembly for H2C differs from official guide to prevent over travel with magnet mod, see “Flush” Picture. Official reassembly guide half way down page H2 Series printer filament cutter stopper replacement and tooth jumping repair guide | Bambu Lab Wiki
Install stoppers back into printer, while printer is off and unplugged move tool head back and forward to check function of stoppers.
