I have a small pair of top cutters(cousin of side cutters) with flattened blades. It reaches over, and around the tube. Pin in, I start squeezing lightly on the tube, at just below the center line of the pin. As I increase pressure, it slides along the pins circumference, drawing the metal tight to the pin till the jaws meet flattening, and then squaring off the upright & base.
Gripping the track upright at the ties, I then use a flat screwdriver wedged under the pliers and twist to force the ties tabs closed(also thumb held on the ties end, they tend to bend up as the tabs go down).
When done bending the rail, I use needle nose on the notch. But not to squeeze it! I rest one tip on the pin-supported rail top, towards the outside edge, the other tip on the bottom inside edge at the pin notch. Twisting crimps into the pin notch, down low, & inside on the rail. I don't usually double crimp, too hard to remove.
I prefer this as a "first assault" because if you close them too far, they can flair too far open at the tube tip when the pin is reinserted (noisier & tin plate bounces off). But I do pull pins & crimp empty tubes that don't take well, after I do the above. It helps get the shape closer to right. Then I do the above again.