I hope it is OK to mention other web sites....
But check out:
I believe the rules there are still the same, but after you become a member and do at least 10 posts, a "library" of excellent materials opens up for you.
One of the on-line library books available is a 17-page, step-by-step instruction manual on how and what to polish on an SP101 to really slick it up. It is written so that anyone with common tools and patience can achieve good results.
I just got my second SP101 last week and after following a few of the "easy" instructions (I didn't disassemble the trigger assembly), now have a 10.5 lb DA trigger pull and 2.5 SA trigger pull with the stock springs.
I have the spring kit and the lighter hammer springs do drop the trigger pull even more --- but since this is a SD firearm and I like the way the stock hammer spring feels, I'll keep this one with stock springs.
BTW, The springs that fit an SP101 also fit GP100's, so I'll use the spring kit on my GP100 target revolver (that wouldn't be a such a big deal if it had a FTF).
Hope this helps!
JMHO - YRMV