I had the Reese 15K with slider on my truck for a while. I used the no-drill frame mounts with the Reese rails. The frame mount brackets only fit in one place on the frame, and after installing my rails, the kingpin was located about 3 inches forward of the rear axle centerline. My slider had 12 inches of travel, and with it all the way back I could not jackknife my rig 90 degrees.
I upgraded to the Pullrite SuperGlide, which put the kingpin almost directly over the axle centerline. With its 14 inches of travel I can now completely jackknife with about 3 inches of clearance between the cab and trailer.
The no-drill frame brackets work fine. I just would have preferred them to place the centerline of the pin over the axle. That 3 inches makes a big difference.
Jim