New and in need of wisdom

[Washout]

Thanks Guys,

Here's where I got to before your latest comments came in - also threw some nema23's and a spindle on there just for show and the x axis one will likely go on the corner with a second ballscrew on the other corner linked by belt or chain.

Maybe a silly question, but is the tool chatter etc linked to harmonic resonance in the frame essentially and if so would assymetric mass damping help i.e. attaching weights to the extrusions in irregular places to stop it singing like a tuning fork?