NEW MEMBER: About to build CNC miller, need design critique please

Having watched Yutube and other sites, I too want my own CNC router/mill
I have created a Sketchup static model for experienced members to comment on before I buy materials.
I have omitted occassional plates so you can see my design better
I have a worktop space 450mm x 350mm max and watch machining area 200x200 or larger
I want to machine steels and brass for vintage motorcycle parts
I was proposing to use 10mm mild steel plate and 500+ oz-inch motors
Any experienced CNC hand who is in UK West Midlands who is prepared to mentor me ?
I hope I have attached several JPG of my proposed design.
Do I need to protect rails from suds and swarf?