[Gary]

Your tools should work however the method may need to be modified. A pair of fine pincer plyers and a lightweight pin hammer should do the job although you may need a tap tool also if your hammer head is wider than the gap between the rails. Hold the pin at the head end with the plyers whilst tapping lightly with the hammer. Remove the plyers and hammer home and use the tap tool if required.

You do need steady hands. If not then pre drill holes.

Happy modelling
Gary