Thinking about this a little more…
Maybe the story-stick concept could be further utilized here. Like when placing a cabinet, pressing command(mac) or control(PC) changes what the marking tool is doing. This could be used to switch between “Drill my first hole here, on-center”, to “Drill my first hole using an offset”. I see this applicable to both System and Drawer slides; more so for slides, as you may want the software to determine the system hole setbacks from the edges.
This would allow you to Start by pushing a “Drill Holes” button, and end with pressing the “END” key, like we already do with cabinet layout. This reinforces the existing process, and leverages it for a related process.
Just a thought.