Well, I would go for a Red Hill Tactical Holster on a Boss hanger first. As for 'tuning':
11lbs hammerspring
10 or 11 lbs recoil
once shot in maybe (i did) a race hammer with 0,2 or 0,4 disconnector
hardened searpin (that's what we in Europe do)
last: add lok grips
Done!! My trigger is a bit above 2 lbs SA