Getting my project further

[flexbex]

So first thank you for all the help I got from you all. It brought me a big step further. So now finally I made my first mechanical drawing of my CNC. My idea is to build it in the folowing way: So the X - axis will be 3.5m long with an accesible length of 3,20m. For the Y-axis I will have 90cm, with an accesible length of 60cm. The Z-Axis will be 30cm. Most probably using a premade combo. The Y-axis will use a ballscrew. And for the long X-Axis I will most probably use a rack pinion. To get the best speed and still be able to cut wood. The frame will be build from 80x40 Aluminium beams. The X-axis will have a double beam. These are the informations I gathered from the helpful meetings with you. I am now looking for the material to build the machine and of course advices on how to improve my idea. I already have two 4m 80x40 Aluminium beams and for the y-axis 2 ballscrews.
[Update]
I want to add some more Information. I just wrote down what I already know for my project.
CNC will be used for EPS (styrofoam) and Wood. Machine should not be to heavy, so i can transport it to Germany more easily. Please see attached the reference CNC.
https://www.youtube.com/watch?v=awQIgS0oPk4&t=99s
https://www.youtube.com/watch?v=kqzg-hDcls4