Loc-Line style modular hosing is used in many ways but mainly it is configured to deliver coolant to CNC cutting tools during machining operations. This "thing" is a first stab at making a printable version for the non-wet variety of uses. Snap several of these together and it will form a re-positionable wire conduit (say for an LED) or arms for a helping hands tool. Another use might be to direct cooling air to an adjustable location near the extrusion nozzle. This version isn't nearly as strong or tight as real Loc-Line but it does hold its position reasonably well, and has a continuous hole through the middle at the maximum angle. I can't imagine it would hold water though :-)
I used a cupcake w/ MK6 and "multiply" to make 6 per build. Also I enabled "cool" to slow things down a bit when building just one or two. It helps to trim off any ooze before attempting to snap them together.
If the fit is too tight, you can use sand paper or an exacto blade to shave some material from the ball end. I will eventually post over and under sized versions to cover the range of printing results.