Hey everyone !
I received my P2S last week and have been print a few parts successfully (except that my AMS2 pro doesn’t work properly). While it has a few very good extruder design, great rigidity and overall good build quality, I can’t help but notice a few quirks that make absolutely no sense to me as an experienced maker that has been using and building printers since 2015.
1. Redundant homing cycles in the start g-code
The stock start g-code contains an unconditional G28 immediately after the bed leveling block, outside any conditional guard — meaning the printer performs a full XYZ rehome after every print startup regardless of whether bed leveling ran or not. On top of that, the P2S firmware’s internal G28 macro always performs a double X+Y cycle on CoreXY (which is mechanically justified), but combined with the redundant G28 call you end up with 4 full X+Y homing cycles per startup. Removing the unconditional G28 brings it down to 3.
2. Motor noise reduction activated before input shaping
M982.2 S1 (cog noise reduction) is called before M975 S1 (input shaping) in the machine reset section. Since M982.2 depends on M975 being active to have any effect, noise reduction does nothing during the noisiest part of the startup sequence. Moving M975 S1 before M982.2 S1 fixes this immediately.
3. Volumetric flow max is artificially low
The stock Bambu PLA Basic profile is capped at 21 mm³/s, and generic PLA profiles at 12 mm³/s. The hotend is rated for 40+ mm³/s. Ludicrous mode scales speeds by 150%, implicitly pushing flow to ~31.5 mm³/s — which means Bambu themselves know the hardware handles it fine. The 12 mm³/s generic cap in particular feels like a deliberate incentive to buy Bambu-branded filament.
4. Travel acceleration lower than print acceleration
In the machine profile (Motion Ability tab), maximum acceleration for travel is set to 10 000 mm/s² while X and Y print acceleration is 20 000 mm/s². Travel moves carry no extrusion risk whatsoever — they should be at least equal to print acceleration, ideally higher. Capping travel acceleration at half the print acceleration is completely counter productive and actually dumb.
5. Sport/Ludicrous modes don’t scale the full picture
These modes scale travel speeds and global acceleration but ignore the limits on volumetric flow max, bridge speed, overhang speeds, and other flow-dependent parameters. The result is a printer that moves faster between points but severely impacts quality — an incomplete optimization to show off but that shouldn’t be used if you want precise / quality prints. Appropriate speed profiles along with correct printer limitations in the printer settings would produce much better quality / reliable prints.
All the start g-code fixes (redundant G28 removal, M975/M982.2 ordering) are available here if anyone wants them: 
https://github.com/scoofz/P2S-start-gcode
As a conclusion, this printer is still an incredible value but clearly not fully thought out on the software / firmware side. Bambu, trust your users, allow them to push this printer to where it should sit. It’s still perfect for beginners, like all your printers, but allowing the power users to push past those limits and do it right would definitely make it the best bang for your buck on the market.
Happy to discuss any of these — curious if others have found additional quirks.
