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

[Wejjmeister]

Right so I have now officially ordered the Steel for the frame, I have gone with a local company, they've agreed a good price and to cut to a decent tolerance level so I'm happy. The bed Will be tweaked slightly as I've never been happy with it, but the frame is the same.

Questions for those in the know:

1. Does this look to be strong enough guys? The ball-screw will be driven by a pulley on the end so that the pitch can be played around with.
2. I'm not sure where to mount the motor though?
3. Will 20mm profiled rails be sufficient?
4. What kind of motor should I use, as I specced all Nema 34 12.1N's throughout so far but do I really need these on this axis?



The gantry is a nightmare, I am trying to keep everything close together to keep it strong, whilst using the space well too and trying to save on machining costs etc, if you have any thoughts so far, please let me know as I am dreaming in CAD lately and my thoughts are all over the place!!!!