I would prefer a universal limpet controller. A size 7 limpet controller would still controls 4 limpets, but one can be a prospector and the other 3 collector. Or 1 a hatch breaker and 3 collectors or whatever combination of 4 limpets you want. As Drelthar said, just pick what's what with fire groups.
It's a software package for limpets. Same goes for flight assists. It's a software upgrade to combine planetary landing, advanced docking, and super cruise assist.