Aluminum profile and alu plate 1500mm x 600mm x 150mm working area, first cnc.

[pierantoine]

Hello,
i've read many posts but know i would like to build and run th machine.
i already have the low part of the frame, and now i'm building the gantry and the Z axis, i had few years ago bought a tb650 kit, some steppers that i will replace with a plc4x-g2 and am882 drivers, and some round supported rails, that i could replace with hiwin 20 mm profile rails for the Z axis.

i don't need extra quick cutting speeds, and want to cut wood, plastics, and aluminum (slowly) if i can.
i don't have a cnc on the workshop, so the design is done to limit the work that i'll have to do myself after ordering aluminum profile and plates that are cutted for me by the seller.
the new gantry design with hiwin rails and the prevous design with round supported rails

do you see any mistakes that i can arrange ?

Thanks for your help.