I recently ran a 3/4 inch non-metallic conduit from my ISP box to my basement as I wanted to standardize the way ISPs pulled cables into my house, wanting to keep things neat. I realized that the conduit tube was sticking out in areas where it was visible, hence the design of the c-clamp. On first try it worked great, and I have since slightly modified the design for greater strength just in case. In the end I was extremely satisfied how it turned out. I hope it is useful to others.
The only improvement I would make is to countersunk the holes to make drywall screws look nicer, and possibly round out the square edges.
100% for strength (for conduit bends)
Best print position is to tip it on its side by 90 deg.