This is an easy to use and print spool adapter for small 250g spools to use with AMS.
The model was upgraded to v2 because the original leaf springs were too brittle when used with ABS, ASA, or PETG, so I redesigned them. The new leaf springs are significantly more flexible and durable. 
 

The idea behind this adapter is simple: print it twice, insert it into the small spool — done! No screws, no threads, no supports, and no play and perfect alignment thanks to the spring-leaf design. It weighs just 76 g in PETG or 64 g in ABS and takes about 3.5 hours to print.