it sounds like what you want to do is dial one single control and have it affect multiple magnets at once

there are two solutions to that .. one is cheating and one involves some hand coding

Cheating - as long as all you want to is move the magnets or scale them then you can parent them to a control ball and use the ball as a prexy to affect the magnets

Programming - you need to make a dial in your controller, and then add lines of code to your magnet to hook them up to the controller. this is not begginner level stuff

Examples - Wyrmmaster used to do this a lot but I think all his products have dissapeared

its pretty much the same as any other ERC call though, the tricky bit is making and saving your magnets first and then renaming all the parts to have unique names to avoid crosswiring in the future

I know some implementations of this explode in DAZ studo, so your mileage may vary

 

Lyrra