Hello. I'm doing a Kirst conversion on my Pietta 1860 Army B.P. pistol. Ive followed the template with my Dremel and It's looking fine so far. But the steel is now very thin at the insde rim on the frame This is the rim that goes around the outside of the cylinder pin and which the template fits around. Am I supposed to cut through this? All of the photos I have looked at do not show this very clearly. I will appreciate any help on this. Thanks, Steve.