Some good progress there.
The Y axis rails on either side of the gantry is unusual. I'll have to see what you have in mind for the rest of it.
Also currently you will not have much Z travel with this design. Are you planning to cut sheets/panels only?
If not and you need to cut things with more depth you will need to raise the X rails extrusions (long ones) away from the bed on supports (raised X axis style).