Good choice wyohunter you will not regret it!
Larry, the X1 probe is a mini coil with a bypass switch integrated into the detector. When selected it becomes the main coil for the control head, the tone, ID, and settings will remain in effect. You can select the pinpoint button on the Safari to get right on top of the target, and switch back for a depth reading on the meter. The probe is sensitive for about a three inches down.
Some items of interest/observation I have experienced that may be of use to you.
1st Remove watch and rings to avoid stray signals (a no brain-er) but I have done it.
2nd The sides of the probe tip are sensitive 1 to 2 inches from the tip. Keep this in mind to avoid probing the bottom of the hole when the target may be a bit to the side.
3rd Yes I am embarrassed to admit it, do not forget to switch back to your primary coil after target recovery! There are few things as MADDENING &^#$%*! when walking a line for a few minutes amazed at how the ground is so clean, or why you get a signal every time you swing left(metal in your pocket). Only to look down at the control switch and see it is still in probe position.
Laugh now, but I promise it will happen to you, more than once!
Good Hunting! Q