I have a mk2 with a pretty good trigger, and just picked up 2 more mk1's that will be going to my brothers. 1 has a terrific trigger, the other has a really really bad pull. lots of takeup, then creep, then a slight bump, then it breaks. at about 5lbs. and idea on how to work on a mk1/2/3 trigger? do I need parts, or maybe just some stoning of the sear? and how do I get to the sear anyway? I"m going to post this in the gunsmithing forum too just in case.