Thought I had read about this somewhere:

Thread: https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=38865

Particularly Tomo's post:
Originally Posted by tomo4192
ive recently been told that to fit the (power torque) module to full crank you need to make the holes bigger on the coil plate and reduce the air gap.... seems to work quiet well

and Mark's post:
Originally Posted by mark electric
Sorry to add more detail:
Less of an air gap would result in less reluctance in the magnetic circuit through the armature or iron core. Less reluctance means a greater flux density in the iron core, so more flux or magnetic lines of force cutting the magnetos primary coil, so primary coil would produce a larger magnetic field, when the electronic module opens (in my mind it is just an electronic switch) the now larger primary field, due to the smaller air gap collapses across the secondary winding this would induce a higher voltage than before resulting in a stronger arc across the plugs gap.
You need 3 ingredients present to induce a voltage.1.Conductors 2. Magnetic field. 3. relative movement.

Mark and Tomo, could you expand on this, ie have you tried it and does it work in practice?