Mine is coming from Germany (to France)
Realistically, the answer to which TPU will work is going to be “it depends.” It looks like Bambu is officially suggesting 85A or stiffer and their own filaments. I have a lot of different varieties of TPU/TPE and they can behave very differently even with the same durometer ratings. So, it makes sense for Bambu to set the expectations somewhat conservatively.
First off, the durometer rating could be different before printing vs after. Some are more stretchy and/or compressible than others of the same rating. Some filaments are smooth while others have a texture. Etc, etc. etc.
For the most part, if you can get a flexible filament to print reliably by hand feeding it through the bypass tube to the extruder during the print, then it should work with the TPU assist module (which is basically mimicking that same action). On the other extreme, if the filament jams even when gravity fed directly into the print head with tubes disconnected and glass top removed, then this device is not going to fix that.
If the filament path in the TPU assist device itself is well constrained, then I suspect it will be able to handle many filaments softer than 85A. That is based on experience hand feeding soft TPU into the bypass tube of my H2D.
As per the Bambu wiki “Note: If you do not have a 4PIN connector on the rear of the printer body, you can use a 4PIN to 6PIN adapter to connect the 4PIN cable to the AMS.” does anyone have a non-aliexpress source (aliexpress not an option for me) for such a cable? Or decent conector parts and a pin out to build one?
thanks
Edit: this is for a P1S and original AMS, in USA
You understand that’s part of the kit, right?
Ah, thanks, I missed that listing when looking at the parts list the first several times.
If the softest filament they used to test developing this module was 85A then they can’t recommend it to be used with filaments below 85A. Softer filaments may also work, but it could be a hit-and-miss.
Agreed. I plan to test all my most flexible filaments as soon as I get the TPU assist module. Fingers crossed.
What about P2S Printer with Exhaust Filter and AMS installed? No more Ports on Filament-Buffer are free to connect the TPU Feeder.
Assuming you mean power ports, the assist module can be hooked up to an 6-pin AMS power output (the one used to chain additional AMSs). Looks like the module’s power cable uses 4 pins and it comes with a 4 to 6 pin adapter.
This is mentioned in the FAQ in https://wiki.bambulab.com/en/general/manual/tpu-feed-assist-module#overview though perhaps something got lost in translation…
4. If the AMS connected to the printer has no extra interfaces, can the assist module be connected to the 6PIN interface on the AMS?
Yes. A 6PIN to 4PIN adapter is included in the kit, and the assist module can be powered by the 6PIN interface of the AMS through this adapter.
I think it means “if the printer has no extra AMS interfaces …”
Also, as already mentioned here, later in the instructions https://wiki.bambulab.com/en/general/manual/tpu-feed-assist-module#step-12-install-the-kit-on-your-3d-printer but oddly only for the H2 series, not P2S:
Note: If you do not have a 4PIN connector on the rear of the printer body, you can use a 4PIN to 6PIN adapter to connect the 4PIN cable to the AMS.
Don’t all H2 have that port? 
-Max
Don’t worry, you’ll be able to pick up one before that on eBay for $70
What I didn’t quite understand from the video was how to remove the spring from the filament cutter. Did I understand correctly that the spring can remain installed? Because in the video, it appears that if you remove the spring, the entire unit has to be disassembled again.
Good thing your model is sticking, I had done the same a couple of days before you and it was taken down by makerworkd for derivative infringement against the standard license the original is based on. Seemed like BL does not want us to help users… I’m glad your model is staying put, the BL original interfering with the top inputs is simply ridiculous.
I just got mine. Very easy to follow assembly instructions. When I connected the module. I press the load and unload to enter calibration mode nad started feeding the PETG filament. Once the filament reached the extruder, the module started buzzing since the filament couldn’t go any further. The calibration process never ended. Does any one knows what could be the issue?
Still waiting for an answer from customer service.
Module is for TPU only, not for PETG
Calibration is done with hard filament
Apparently the module stops feeding when the filament reaches the extruder and the tension pull against the spring plate the output connector is attached to triggers the end of travel. Is the PTFE tube pushed all the way in that output connector (and in adapter and hotend)?
When the module is feeding during calibration and you slightly pull on the PTFE tube at the output, does the feeding stops. If it works, the calibration will be completed but not done properly, you’ll have to do it again but I suspect it may not work given your issue
Instructions are very clear, the calibration has to be done with PETG or PLA.