My baby 15" x 15" machine

[wilfy]

finally getting somewhere with sketchup, i wanna run this past you lot before i progress this further

the 2 small piece of box section are 25 x 50mm steel box and i'm hoping to mount the router straight to them with a bracket i will design later down the line..

what i want to check is that the rails are not too far away from the router.. the box section the rails are mounted on is 50 x 50mm steel so that puts the base of the rails 75mm away from the base of the router support

and also the piece that the ball screw is mounted to is 10mm. firstly can i easily cut through 10mm steel with a holesaw? as thats the only way i'm going to be able to cut it? if not is 10mm thick ally enough considering how close the box section will be either side to support it?