This little tool helps me and If it helps you great... if not no worries.
First I like to measure my cutters from tip to collar and then add the collar thickness. Then subtract that from the Spindle distance from Z Home to "A" Axis Centerline.
It's all in the spreadsheet. I also use this as a double check to when I input values I input in Axis Tool Entry screen. And typically do an MDI before I run a program
Like if my program uses Tool 1 and Tool 2 I'll input G43 H1 enter and see the DRO screen report Tool 1's length and I compare it to the spreadsheet. I repeat for Tool 2.
At the moment I do use similar tools for hard and soft materials and for ease of program I've duplicated Tool numbers.
But may go with unique numbers for each tool in the future. Think I'm going to label my tool tray with #'s and assign.
Randy Kopf