Unconventional DS-1 Mods?

[Chistopher]

I've got half a dozen DS-1 that I've all modded different ways. I know the circuit inside and out by this point, but I'm wondering if any of you guys know of any peculiar mods I could do to this new DS-1 that I've found myself with

 

[Aceman]

I would honestly guess, that all the DS-1 mods worth doing have been done.