Folks,
it makes no difference, whether you put the power lever on low or high
before loading, i.e. there is a difference in the loading effort (somewhat fractioned if you put it on low [it is a non-return valve that separates the two chambers]), but the power of the shot is determined by the power setting
after the gun is loaded. For example, you can load the gun on 'low', and still enjoy full power, if subsequently you switch to 'high'.
It goes without saying that I have removed the teflon separator and, hence, the low/high power functionality on my 110cm Sparks/Stealths with Mamba/Poseidon kits.
However, I have also noticed on my smaller guns that the power reducer often does not work properly, because the o-ring on the no-retun valve / plug which seals off the chamber in front of the separator was misplaced or defective.
For those who are unfamiliar with how the power reducer actually works:
Cheers, ulysses