I know this may have been asked a thousand times but here it goes again. I have seen on here people asking about filling the conduit with concrete to increase the rigidity but people saying the added weight would outweigh any increase in rigidity and it would sag under its own weight.
So my question is this. Has anybody tried printing 6in cylinders with a 50% infill and epoxied them into the conduit. I would think that would add a substantial strength while at the same time not adding a ton of weight.