Newbee looking for advice

[dandy]

heres my first attempt of the bed. made from 50x50x2 box section for the main frame and the bed will be 40x20x2. i will have A-frames under the centre of each beam and get rid of the uprights. this will also allow for ball screw option for the x axis.

i cant help thinking here that 50x50 isnt stiff enough but with A frames should be ok

the actual size is not determined yet, im just hoping im barking up the right tree here but probably looking at 1100y 900x

hiwin or similar rail for the x, not round i just dont like it.

big question ???? how accurate or square do the x axis members need to be with regards to setting up the rails? i suppose i mean if theres a slight twist in the box section.

must do more research