Quote Originally Posted by Bush Flyer View Post
OK I give up and have deleted all drawings to start again
Oops, lets not over-react, don't empty that recycle bin quite yet. But you are making a newbie mistake

There is no set way of doing this, best way depends on what you have to work with and what you are trying to achieve.

The newbie mistake is guessing that at some nebulous time in the future you will want the gantry to clear 6".

In the real world you do 99% of your cutting in the bottom 1" because that is the length of your average router bit.

Get it wrong and 99% of your cutting is done at full tool extension and the machine tries to shake itself to bits.

Q1: What height does your gantry need to clear?