Build in Progress

Attachment 30049

This is as far as I have got so far.
All axis run very free, very happy with that.
One thing I need answers with is on the Z,X axis, It is very heavy, between sixteen and seventeen pounds, that is not including the Spindle, which is a 2.2 kw model, not sure of the weight of that yet.
My concern is, are the motors, 2X Nema 23 3Nm 4.2 amps going to be strong enough to lift it, or would it be better to have the motors push it up ,or pull it up.
Hope someone can help me on this one.