Not perfect as my patience isn't geared toward the tedious lol. I undercut the trigger and rear grip. Doesn't seem like much but I feel like my grip is much higher and I like it a lot better.
Not sold on the under the trigger guard part yet, but easy to get rid of... Probably 6 or 7hrs. Lots of breaks were required lol. Only cost me an $18 Weller iron from Home Depot