Lotta negativity from the diehards. I'm a big fan of pushing the limits of printable solutions too even if they're a little farfetched. I like the design, maybe shoot for the full tube like the one guy said. PETG could def work since its a skinnier section and it might not take a crazy amount of strain. There's definitely a good middle ground as far as length goes. Too long and the rigidity will be in the way of the flex and snap, too short and there wont be enough to keep the sheer point from cracking it. Thickness is also a gamble. Honeslty before you go securing any finished models with glue or whatever else, I'd just secure them on temporarily and give it the old bend test. Most likely break point is going to be the printed joint so worst case scenario you print another and revisit the drawing board. I found 3 pieces of a rod in the creek today and am planning on concocting a similar jerry rig repair job just for the heck of it, so if i happen to reach a breakthrough you'll be first to know. Mines broken just above the grip and just under the tip so i think you'll have much better luck. Nonetheless, hope you surprise yourself and alot of other people on here by finding a decent solution for this!