Downpipe clamp

Parametric (downpipe) clamp, which can be used to keep things in place or as a starting point for further design. In my case, I am using the clamp to keep an outlet for a rain barrel in place (see photo).
Default dimensions are for a downpipe with 100 mm diameter and a M4 hexagon nut with corresponding screw, which should be about 20 mm long.