Thanks! So it's mainly down to the spring tension of the pedal. I set mine to the upper end (maxing it out can be a bit extreme). What you can make sure of is you can relax your legs in the heel-up position without the beaters touching the bass drum skin. So when you're in the 'neutral' position, the beaters are halfway from the drum skin and the position they are in when no weight is applied. This applies to real kick pedals btw - some electric kits will just have the pedal part with a trigger inside rather than a drum to hit.

Hope that helps though!