gainEqOverlayCtrl:setSlot(helpers.boundsToSlot(gainEqCtrl:getBounds()))
This fails on E1 Mini. boundsToSlot returns values that include the slots for groups. setSlot seems to have only 8 slots for the main controls. It seems like numbers above 8 resolve to slot 1.
Would be simpler to have a control::getSlot() method, but there are other uses for boundsToSlot.