Recently picked a like new customized Ruger SP101, and wondered if anyone might know who did the work. It has a three inch barrel with three ports on top, polished trigger, interestingly machined out rear sight groove that has a half-round configuration that works well for me. The rear sight groove is also matt finished. Front sight has red ramp insert but looks like it came from another Ruger, shows wear. Hogue compact grip. Action also feels like it has been reworked. Maybe the three ports and polished trigger might be someones's trademark.