Yes that, how to drill delays with an ordinary drill bit, used to be on the Aerotech site, and I can't find it there anymore either. Turned out I even had a drill stop already, which otherwise would had never been used. This seems more precise to me than their tool, as well -- I attempt, at least, to drill within 1/2 second, and definitely within 1 second, while their tool is in 2 second increments.
If they're really considering going to a single long delay for all motors, this should not only still be there, it should be linked from the front page! Or in their instructions, in short form. One thing about rocketry that bugs me is the way it can "nickel and dime" you, so many little things you need to buy. Not only expensive but rubs me the wrong way. Although I don't think they're actually doing that with the delays-- there's no sign Hobbyline reloads will be yet, and I think fixed delays appeal to the less experienced. (I do presume they've added some kind of drill instructions to their reload instructions for the single delay reloads, which is overdue anyway.)