I am installing RR lower parts and opted for their 2-stage trigger.  I was having a problem getting it to seat at all so I widened and opened the ends of the slot little by little trying to get it to seat and now it is quite wide and the trigger seats better but still not quite perfect.  It seems to still be off as I can see about 1/2mm of the trigger body showing in the bottom of the push pin area.  I am starting to wonder if maybe the entire well is about 1/2mm too high because continued widening or lengthening of the slot is not seeming to help.  Any ideas before I really screw this thing up?