Used a $7 file from Home Depot and removed the finger grooves. Took 15 minutes or so. Im putting talon grips on it so didnt worry about the finish too much, just used the finest grit on the file. It has 4 grits on the file. I may do the heat reduction method for the back strap, havent decided yet. I may also do an undercut on the trigger guard for my knuckle, but I dont seem to have that big of an issue.