Hello, Sorry if this has been asked on here before or there's a right place to put this... But I'm building a 3x4 CNC and I'm buying the aluminium extrusions for the machine in the next few days... The problem is this is my first machine, So I'm in a whole different world to what I usually do, So I have been wondering, for the 3 foot side, (which will be over 3 foot... About 4 in total but working area 3) Will 60x120 "80/20" be suitable for the shorter side? Stability and rigidity-wise?

I'm using 20mm Supported Rails too so I'm hoping they will add some stability.

Thanks in advance!