Have any of you guys ordered a Jim Maccari tune kit for the S1K?

What will they need to know? Do I need to measure the spring? I am thinking of getting the lube, spring and seal if availible. I have had the gun apart before, really not bad to do at all. Have any of ya'll installed one, and if so, will it help tremedously? I am also thinking of getting a trigger insert. I know Rich has these. If the cost of the kit itself is not too bad, I will put one in and see if I can smooth it out some more. I took mine apart and just deburred everything, and lubed it better, and polished the existing trigger. Man what a difference. I guess what I am asking is will the Maccari kit be that much better, and if so, what do I need to measure?

Thanks