HI everybody , I m in designing stage of a new cnc machine , never built one this size , it has about 950mmx700mmx300mm working area (for now but gonna change it to 1200x900x300 later) it will be used for mostly wood/acrylic/plastics and aluminum ,and maybe some very thin steel sheets , anyway i ll be grateful if anybody point me any suggestion or errors in this design , the specification is :
X axis :
20mm supported linear shafts with 4 blocks and rm1605 c7 ballscrew with anti backlash ball nut
Y axis :
16mm linear shaft ,supported by shaft support , 4 shaft blocks as well , and rm1605 c7 ballscrew with anti backlash ball nut
Z axis :
same as Y axis

body made of 3/8" aluminum , it s some how a minimalist design no need for any machine cut , just screw holes , the other specifications :

steppers are nema 23 425oz no decision on controller yet and finally a 1.5kw water cooled spindle

so what do you think ? nothing is final yet so I m open to any suggestion

Regards