Originally Posted by sailingdog
I think that would be correct... the Strong sail track, from what I've seen of it, is pretty simple to install and works well. IIRC, it installs by attaching to the existing sail slug track on the mast.
Correct. Tides Marine will send you a set of gauges to measure the width and depth of the existing track and slot on the mast. The track is then milled to those specifications.
In most cases, modifications to the mast gate will have to be made - in the picture below, my mast gast was extended from 1.5" to about 3", both sides of the slot. It is imperative that the opening by filed very smooth - the smallest burr will gauge the track and eventually cause it to bind. A little dish soap and it slides right in. Below the mast gate the back of the track is flat, with several screws and backing plates that fit into the mast track and are then tightened to keep the track in place.