Every handgun has a different feel to its grip.
Front to back length, thickness, and angle to the bore line all play a part in how we grip a handgun, and a MAJOR part in how accurate we can be while using it.
If it is too thin (which a lot of the polymer single stack nines are), then you don't have good contact under your palm, thus allowing the grip to move around under recoil.
If it is too short, then your fingers might curl around the frontstrap too far, putting your knuckle directly under the triggerguard so it gets whacked every time you fire.
All of this can be fixed.
Can't do much to grip angle, however, most manufacturers have it figured out that if it is fairly close to the same as a 1911, it'll work for most of humanity.
So, the project tonight was to make a fantastic grip even better on both of my Walther PPQ's.
The 9mm has replaceable backstraps, which is a good start.
In my case the small one worked ok, and I could live with it if forced to, but the hump was annoyiong and could use a little more thickness near the top.
This is the small backstrap off the handgun, You can see the distinct hump:
The medium filled the upper part of my grip perfectly, but had even more of an annoying hump near the bottom.
So, out comes the dremel.
I flattened and rounded the hump, which in my case, now makes the sights sit level as I grip it, and places the part of my finger that I want perfectly on the trigger.
I added the Talon rubberized grip after I was done.
I did the same thing to my PPQ .22. It doesn't have replaceable backstraps; it is equivalent to the medium one. Now it looks the same as the 9mm.
Next project is to make my PPS grip slightly wider and longer. I wonder if anyone can figure out how I'll do it...
