Here's the rough design... I did this off the generic bladder hardware.
View attachment 565407
I believe OMS sizes are a tad different. To print yours I need;
Number of flats if the elbow is a polygon base.
Size flat to flat of elbow base (or diameter if round)
Thickness of elbow base
Diameter of inner hole on elbow clamp ring.
Get me those (to nearest .5 mm if able) and I'll print it tonight, mail the first attempt Monday!
Respectfully
James
thanks James, I've got a micrometer somewhere in my tool room, I'll dig it out and get you the numbers this pm sometime
and yes, it's a polygonal base