For angled surfaces the head decks on a V8 engine block when working without CAD.
With the probe head angled appropriately (or not), I manually drive the probe up as close as I can to the surface, without actually taking a hit. I then do a vector point with the appropriate vector for that surface. Prehit and check are increased so basically I am telling the probe to "travel along this vector until you hit something".
Do three hits like this and create a constructed plane.
Now, make a new alignment and level that plane to a major machine axis. From there on, all your stuff uses whole number vectors. Makes doing anything else on that surface a lot easier without having to try and manually drive the probe around hoping you are taking hits normal to the surface, or fiddle around with vectors less than '1'. On our one DEA machine, you can't drive the machine diagonally to take a manual hit in slow mode (which is what you have to use in order to take a hit, fast mode, which allows diagonal movement won't allow you to take hits, it just locks up the machine if you do).
