Been away for awhile but need some input on a trigger replacement for a pre-accutrigger Mark II, built 1998-2006 timeframe. The present trigger has a hitch in the rearward movement that can throw off a shot. Since I can't seen exactly what it's doing inside the enclosed assy, I'm looking for a replacement. The only replacement/upgrade I can find is the Rifle Basix SAV-R sear replacement. Has anyone used this item and what success did you have. If you have used this part, are the online directions as simple as they seem or are there hidden techniques I need to master. Or are there any other recommendations I haven't come across?