That is quality info! I'll say however that I'm perhaps equal and opposite to many when it comes to recoil spring weight.

It's my opinion that the pistol is specifically designed around a recoil spring weight and while you certainly don't want the battering associated with being under-sprung... OVER-sprung is also not a good answer. It's battering in the opposite direction and it's running outside the design spec of the gun.

I'm not saying that you can't do it (there's a time & place when it makes sense) but there is no free lunch. If you increase the recoil spring weight, you are slamming the pistol in to battery with more force than it's designer intended.