Not sure what a track saw is and I'm too old a dog to learn new tricks. I've been restoring sash windows for donkeys' years and often have to take small amounts off the edges of the sash stiles and sash rails. The quickest way to do it is with a portable circular saw. First make a simple a jig costing next to nothing from two pieces of ply (6mm is ideal), one about 30mm wide making sure one edge is dead straight, the other about 300mm. Screw the 30mm piece to the wider piece, positioning it so that its straight edge is at least 5mm more than the distance from the saw blade to the edge of its baseplate. Then run the circular saw baseplate along the straight edge to cut off the excess from the wider piece. The jig edge can now be clamped along the line of whatever you want to cut as long as it's within the capacity of the circular saw. For cutting across the grain you'll need to score a line with a sharp knife. We do dozens of these cuts and when the jig gets damaged, as it inevitably will we either reposition the narrow piece and recut the edge of the wider base piece or chuck it away and make a new jig