the reason for using 50x50 was to allow spacing for the ballscrew and it's bearings but i'll re-think to try and bring it close.. plus using all 50x25 will be a bonus.

i had planned to use timing belts so i'm glad we are on the same page there.



the back plate which fastens to the y axis i am acctually considering using alu or steel plate in place of the box section as wont be able to use 50x25 box in the way i have in the drawings as the bearing blocks are 60mm wide with the holes at exactly 50mm spacing so i need to consider either 10mm alu or 6mm steel are both of these stiff enough if i'm using a piece of 370 x 170 plate?

and thank you for your input so far it's nice to have your mind put as ease especially considering i'm adapting other peoples ideas but realisticly drawing this blind