Bayrunner,
I have two early (5-digit) frames. I sent both of them back to T/C for misfiring/lock-up problems. They were both converted, by T/C, to easy open - FREE! The first one, I was a little disappointed, as they didn't tell me that they were going to do it. The second one, I kind of half-way expected it. That said, I have no problems with either system. The new hammer IS easier to deal with, when yuo forget to switch from rimfire/centerfire until you get into the field. That I do quite regularly, guess it's Allzhiemers!,,,,,,,,,,,,,Bug.