brentfoto,
Yeah, that sounds like a nightmare.
If you're going to go to the trouble of having a gunsmith install the D spring, you may as well go ahead and clip it now. Taking 2 turns off the D spring is just as dramatic a reduction over the D as the D is over stock. Once you have the D spring, you're gonna want the clipped D spring. No sense in payin' him to do it twice.
If you want to see how dramatic the difference is, try handling a used 92D sometime. That'll demonstrate the difference better than raw numbers.
*edit* one of the Beretta guys hunted down our old
Trigger job how-to.