Humble Beginnings - For Alu

[JAZZCNC]

I'll shoot first. .Lol

Don't need Nema 34's 23's will be more than enough.

Don't need 2x rails per side they won't add much to the machine other than expense. Linear rails can handle massive loads so one rail with 2 bearings will be fine.

The Single piece Box on Gantry is NO where near strong enough for cutting Aluminium and will need massively beefing up.

The 20mm Plate for Bed is Good but will still need a Decent frame building under it and 1 cross piece won't be enough.
Don't under estimate the forces for cutting Aluminium.! . . To achieve decent quality of finish the machine needs to be very very ridged.

What you have drawn so far won't cut Aluminium overly well and full fill your criteria.!! . . . . . More beef required, Esp on the gantry and don't be afraid of the weight for cutting hard materials it helps.