I responded you in email, but will say it here also:

Dont be in a rush, read similar threads, that will help avoid mistakes, misunderstanding and wasting time of fellow forum members.

If you WANT IT NOW -pay somebody to draw that for you in cad and explain it to you. Otherwise take the correct way-start build thread, make some drawings and start resolving your doubts one by one.

If you expect to understand all in one night without reading similar builds and analysing them you will definitely make some mistake.

From the couple of emails we exchanged what i see is that you jump from one thing to another, i am not sure how to help you . I could give you drawings, tell you what you must or have to do. But what help is for you to copy somebodys build if you don't have the money to pay for the pieces or to make a machine that is intended for aluminum and use it to engrave wood?

You need to have clear:
-what you need the machine for
-what real life precision is ok for you
-what travel xyz
-speeds
-what spindle
-how much money you will spend for the build

So take a break, start from the beginning and we will help you. Otherwise you could run into a situation to have the same cash you have prepared for the whole your build as i have prepared for my breakout board and motors