Ticktock,
If you need it, it doesn't matter if you are advanced or a beginner.
Robert's method might work in some fashion on some movements, mostly production movements, but on a hand made earlier movement, all bets off. IMO
There are some other discussions on depthing tools, including an alternative method with a milling machine, offered by Jerry Keifer.
You might search on "preacher" too. It has it's uses in some situations.
Ralph