@ Kelly, there is bite sport training clubs Nation wide, including a great all breed club in Vancouver that has worked with CC. It involves a lot of determination, work and Dedication but the bond built with your dog is worth it.
It should not be a liability with a stable dog but more the opposite. The training and control is quite phenomenal.
Key word is stable dog.
As for type variance in the CC... I have to disagree with it just based on age of breed.
Look at the dogs in the 90's and prior, some amazing animals... Then not that long ago the Boxer influence is easily seen. In Europe dogs with retracted jaws, pinched nostrils (in standard the CC should have wide open nostrils), round eyes, mono convergence started winning. Breeders started breeding to that, the FCI standard changed to allow 1/4" undershot to what was once tight reverse scissor. Looking at the standard changes in the 343 over just 20 years is scary. The standard has promoted the BM Corso, I believe to differentiate from the Neo. Creating a small boned, jumbo frenchie.
Supposedly some breeders in Italy had 2 different pups, the BM crosses that they would sell to Americans and the CC that they would keep. Looking at some of the dogs they look nothing like the CC.
The Americans were adding their own ingredients to the mix, Modern Neo, Rottie, Dane... You can see the influences looking at the different lines.
Thankfully now it seems there is a resergence of the Mastino or "flour" in most kennels. With the return of Vito Indiveri and more of the old timers speaking out the breed is beginning to return to what it was, thankfully. Hopefully it stays and continues.
Here is a link to one of my fav males in Italy.
http://www.canecorsocastrignano.com/achille.htm
He is out of the kennel that Aurora's dad is from. An old school family who have continued breeding over generations to the dogs in their area.