Parametric ceiling multi-pipe attach

Well, I was looking for a multi-pipe attach for pipes that I have to pass in my garage, and could not find any parametric ones, so I made one. It is parametric in number of pipes and in diameter, however it tends to have holes if your diameter vary much between two tubes. Will maybe fix later. Should be mostly OK for pipes from 12 to 24mm. Attaching an example STL with 2 20mm pipes with a 16mm under, as displayed in the image. Made a second version because the first one made you unable to screw it to the ceiling. You will need a long screwdriver :)