"b" is too close to the normal hammer locking edge. If the new locking edge is added at b, the purpose of half-cocking is lost.
I would think it's much better to add it to the hammer disc under the sear when safety level is on (and hammer down). The hammer head will be locked 3-4m/m away from the firing pin when it's half cocked. Marked by red line in the pix.
Locking/clearence of the newly added locking edge must be manually adjusted by filing.
|