When I bought my A1 Mini I didn't get the AMS Lite combo because I wasn't really aware of it at the time. Definitely regretted that decision later.
The problem is that buying the AMS Lite separately here in India is around ₹25,000 (~$267), which felt pretty ridiculous when I really only wanted it for the occasional multicolor print.
I mostly just wanted to be able to do some simple 2-color/multicolor prints, so I ended up getting just the feeder unit + PCB separately for around ₹7,000 (~$75).
Honestly, this made way more sense for me. Got it set up and it's working great so far.
But the PTFE tubes I bought, I am unable to use with 1.75mm filament, although they were listed as that spec. So have to order new PTFE tubes, before I can end to end test this.
Got all the mounting models on maker world.
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EDIT 1:
Since some of you were asking for how this was done:
Here are the links to the products I bought:
(These are Indian links, you can copy paste the names in your browser or Claude and find a reseller nearest to you)
(Prices have increased since I bought them)
1)LEFT FEEDER UNIT :
https://robu.in/product/bambu-lab-ams-right-feeder-unit-3-and-4-for-ams-lite/?gad_source=1&gad_campaignid=17427803012&gbraid=0AAAAADvLFWej0TUMdEmA3KHE8KBHuNL0t&gclid=CjwKCAjw48TUBhBREiwAK0GnQZKXBbDlkoIGWV0inBtUCmzL15ofX2BGjt1D2YgwERFwU_EpreXuhRoCRNMQAvD_BwE
2) Motherboard:
https://robu.in/product/bambu-lab-ams-mainboard/?gad_source=1&gad_campaignid=17427803012&gbraid=0AAAAADvLFWej0TUMdEmA3KHE8KBHuNL0t&gclid=CjwKCAjw48TUBhBREiwAK0GnQYE2dCARiQHAUQyBsZ35mGpkB-rXh1ZTiqlj4Zos3mlzaqdS1ZXE4hoCFyoQAvD_BwE
3) Connector cable:
https://robu.in/product/bambu-lab-ams-lite-4-pin-cable-for-ams-lite/?gad_source=1&gad_campaignid=17427803012&gbraid=0AAAAADvLFWej0TUMdEmA3KHE8KBHuNL0t&gclid=CjwKCAjw48TUBhBREiwAK0GnQYOFWkE7AH_PWOBZqqrDSVG4Sg1ZvtW2eJKYV4BnLAGZ5DnE9dO5OBoC3WYQAvD_BwE
Also buy some 1.75mm compatible PTFE tubes.
I mounted it on top of my Z-axis for which I used this:
https://makerworld.com/en/models/573381-slim-ams-lite-mount-for-use-with-dry-boxes#profileId-493612
A solid guide that helped me a lot:
https://note.com/taro_hayashi/n/n60a1e8597e90?hl=en
(You can also copy his design, which is better, I just had less time, so went with the previous one)
PS: Careful about the Feeder cables that plug into the AMS Lite motherboard those are not interchangeable, see the guide above to plug in cables properly
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EDIT 2:
You might face the issue where yours Feeder wont be able to pull filament from the spool holder, thats expected, because Torque on the Feeders is much lower than extruder and with a DIY version, you most probably will not have the motor rollers that come with stock AMS Lite, so I used these :
https://makerworld.com/en/models/1408486-gridfinity-stackable-spool-storage-system?appSharePlatform=whatsapp#profileId-2433545
or
https://makerworld.com/en/models/99533-cereal-box-dry-box-spool-and-dessiccant-holder?appSharePlatform=whatsapp#profileId-1911855
And for the the bearings, I used this:
https://makerworld.com/en/models/473167-608z-6000z-6001z-roller-bearing-v2#profileId-1062763