Be careful, It is still not reliable, problems wont be solved by capricorn, it still stuck sometimes, I am looking for a hardware fix .
The main, maybe the most important issue is with the output motor of the AMS, it act exacly like an extruder on a bowden printer, problem is that like most extruder it use a spring wich is set very strong, so for rigid material, often on extruder with a spring you release the tension when printing TPU or any flexible filament (but reducing filament path is already a good thing, requiere less force, exacly like a bowden printer).
I have fully disassembled the output of the AMS with its motor, wich could be painfull for some, if you try, dont touch to the four hall sensors !! it is not the problem and it took me more than a hour to fit all the parts back (4 springs + 4 magnets which are jumping everywhere :))
I am doing some tests on differents spring tensions, as well as some other tests, I will update this thread if I found something that can really make it reliable.
Spring removed :
Less tension, well I had no other choice than cutting it 
Unfortunatly this is not the best design for an extruder…
