I've also been thinking about enhanced bidirectional communication. At the time, that would have required a complete firmware replacement which would have been more work than I could afford and sort of defeats the point of getting the 3d Chameleon in the first place. I guess we will have to wait and see what the "Pro ecosystem" brings!!!

Thank you for the extremely detailed response. I'm planning on making Neptune 3/4 Max install videos, but I was holding off until I had a better sense of the mk4 (pro) ecosystem changes. I'll start moving forward.

Correct, I'm referring to the motor drivers (and maybe other circuit board changes). I think Bill said the new design used TMC2209 drivers while the older boards use A4988 drivers (not at home, but I think that is the correct model number).

The FAQ has already been updated, but the new answer appears to conflict with the previously released information. I'm only asking so I can figure out my filming schedule.

Bill has previously stated that the pro will have "extensive hardware changes" requiring the purchase of an upgrade kit. He also stated that the new features in the Pro require the newer driver chip to perform filament sensing. I have no problem purchasing upgrades, I just need to know what to buy or self-source.

Honestly, I don't know. I'm waiting for my order to arrive before I figure that out. While the Neptune 3 Max uses Marlin, I'm going to install Klipper once my BTT Pad7 arrives. I also have RPI4's and various microcontroller dev boards if a simple solution doesn't work. My goal isn't to recreate functionality just for the sake of doing it. Instead, I just want to remove both the switch and the delays associated with it. I'm also planning on adding a Swapper3D once it becomes available.

I currently have a Neptune 3 Max, but I plan on (eventually) heavily modifying it. Once I get my CNC machine, I'll probably start designing my own printers, though.

While it will take a while for all of the parts and components to arrive, I'll document my approach to getting something to work.

Thank you for the reply. If I connect the switch lines to the GPIO, can I reduce the switch time?