Thinner Cen-tec locking ring

This is a thinner version of the Cen-Tec locking ring, measuring 2/32" (1.6mm) in thickness.
I found that the original designed locking ring (at 3/32", 2.2mm) was notably difficult to unclip, this thinner version much more closer matches the Cen-Tec original at 1.6mm thickness and tools easily unclip when using it.
No change made to the hose adapter.
Print in PLA, PETG or ABS. PETG or ABS would be harder wearing.