decided random bending was easyest. I thought I could get my dad to make a mold by squasing a steel rod into some aluminuim but decided against that (aluminim strong enough?). Today I soldered it together after giving up witht he random bending
In the pics you can see they are bent different amounts but I think there close enough after bending them more with plyers and squashing the ends flat in a vice. The ends need trimming a bit I cut them about 1/2" oversize. Also might cut the 15mm pipe off the ends and put 12mm pipe in for the barbs