I made the same changes to the LCP and find that to be the answer to the one and a half finger hold. Like you I had to adjust the piece several times for each mag run. Now there is no problem. I also put fluorescent paint on the front sight for my old eyes.
Ruger give us a 7 round mag with same thickness end plate and you will have the excellent control lacking at this point with the 6 round mag. Just my opinion.