I had my 4" S&W model 65 done about 20 years ago. I also had them to round the butt off. I still have the gun and I love it. Others don't like it, so YMMV.
It was a long time ago, so I don't remember how I paid for it.
Here is a picture of it. It is one of my more frequent carry guns.
Have you done any low light shooting? They advertise that the way mag na porting is done, it doesnt create much of the flash you normally see on ported firearms. Just wondering if you have any issues with being blinded in low light shooting.