For me the grinding off of the curved ridge changed the whole feel of the gun. Being able to hold the gun with my little finger not being crowded by the curved base plate or hanging down under the magazine gives a much firmer and comfortable grip and better control of the gun.
I put epoxy in the little cavities and then ground them down until they felt good. I did not grind mine down as far as RC did. He ground his down until the front was at the same angle as the front of the frame.
I left a little bit of the ridge in place. It gives the little finger a place to hang onto.
RC did not do the epoxy trick. I am going to put tape on the front of the base plate and fill in the hole as I prefer not having that hole in front.
By putting Vaseline or something for a releasing agent on that part of the tape that covers the hole, it should be easy to remove when the epoxy is set.
A little bit of file work and it should be good to go.
BTW Midway as the curved CS45 mag base plates in stock for under $4.00 if you decide you don't like the results.