Router mk1 - First dip into CNC

[robump]

I have just had a 30 min go on sketchup to try and implement some of the more simple suggestions for your gantry design, is 50x50x5mm aluminium box strong enough or should i be using a solid alu billet for the riser off the linear rails?

Now going to look at strengthening the base and working out the cutting area.

Thanks once again.