I started to say; "Welcome to the Forum" but I see you joined a while ago but only have a few posts.
Now, I do not have a second gen SP-101 in 22,,, but I have an older one. I also have a few other SP-101's too. As for the grips,,, they should fit w/o any issues m what I've seen.
And, as for the triggers being heavy,,, I'm always of the mind I want it to function reliably. I leave in the factory springs most often. If I want a better trigger pull, I do an action job. And if it's still an issue,,, you can buy a set of Wolff springs & start with the lightest one, check reliability, and if not 100%, replace it with another spring until you get both a smooth action & reliability.