Advice on Mammoth CNC Router Build - Steel Framed - 2440mm x 1220mm cutting area!

[Wejjmeister]

So I've been planning to build this thing for quite some time now, finally I have taken the plunge and started to finalise the specs. I have read, re-read and read again many of the posts on here looking for advice and ideas, and I am now ready to lay out my designs in front of you guys for some no doubt frank but highly constructive criticism hehe!

My machine will be used for every type of material between balsa (model making) and Aluminium, and must be able to cut 1220mm x 2440mm sheets of the above materials at times. I will type out my specs a little later on as I'm limited on time at the moment, but I have put together the design in Sketchup for the general idea, and wondered before I go any further if you can give me ideas as to whether it will be strong enough or not?