Alfonso,
Below is a copy of the post that has the image of the checkering, taken from another thread ("After-Market Aluminum Grips")
To answer your question from my perspective, checkering
completely negates the need for any type of friction tape, etc on the grips:
OK guys, as promised here's a test image (that I hope will come up) showing my C10 grips with the checkering. I can do this same pattern on any grips, though on older grips it would be altered a little because the RB logo is in a slightly different location. Cost shipped 1st 48 $39.00 1 week or so turnaround. I'll copy this post to classifieds too.
This checkering dramatically improves handling on CF grips. I can easily draw from a tight pocket with thumb and one fingertip no matter where they land on the checkering, even with dripping wet fingers.
Also shown are the black oxide screws I have that will not socket-strip when removed, even when locktited.
If this image comes thru I'll post one a little later on showing the night sites I've installed.