Take a look at:
http://www.network54.com/Forum/392756/message/1110838050/trigger+overhaulIt's got photos and information about the trigger, how to disassemble it and improve it. And there is more info on other posts there if you look.
It's not really necessary to disassemble the whole trigger mechanism as shown, but it helps to understand how the trigger functions, so it doesn't hurt. Getting the sear spring back in takes a couple of tries until you get the hang of it, but otherwise it's a pretty simple operation. The main goal is to polish the two engagement faces (No. 2) in the last photo. Polishing the trigger to sear engagement is not so important, but won't hurt.
In addition to the things shown on the page, I:
A. Ground appx. 1/3 off the sear, as per one of the other posts there
B. Polished the sear face and mainspring plunger face to a mirror shine after honing them.
C. Replaced the sear spring with a lighter one (one post recommended cutting a coil from the sear spring but I replaced it instead)
D. Replaced the rear trigger spring, it seemed to only be there to keep the trigger from flopping, but was strong enough to add to pull weight
E. Filed down and rounded the "peak" on the safety bar so the safety isn't so hard to operate (didn't help the trigger but sure made the safty easier)
Test everything for safety when you finish. If you have questions let me know.
Dan
PS. I'm not trying to advertise another forum, just pointing to the information. Besides that forum seems pretty dead anyway.