I'm working on some creating some sketch driven configurable files to add to my companies design library (converting from ACAD to SW). The image below is a sampling of just some configurations for one such part. As you can see, there are variations in number of holes and staggering in these mounting patterns. I'm looking for some advice from someone who may have experience doing some variable patterns such as these and how they'd go about doing them. The end goal is to be able to drive configurations of this part off of as few variables as possible. I'm currently playing with fill patterns and variable patterns learning how to use those and seeing if I can get where I want to be using those methods.