I am not a fan of stipple jobs but yours is one of the best looking ones I've seen. Some people just don't know when to stop; I'm sure if they could get some stippling on the inside of the slide they would do it.
Looks good, I did mine after I chopped the grip of my G22 to take G23 mags. I also did the finger texture and the backstrap texture (as you can see) because I didn't like the way they felt in my hand. This is much nicer and I love it. I am actually thinking about doing it to my little Kel-Tec P11 when I get a chance.
I don't know how you grip your pistol, but if you use the Thumbs forward grip that many people use, you can stipple in front of the take down notch like this:
It looks very nice, I've tried it on a few things but still can't get it down.. I've seen some pretty cool new ideas on u-tube also. I guess I'll let you guys be the pros at this art form..