Yes Michael has been doing quite a bit on it.

I am not sure as to what way to go...

I could increase the gantry height easily by adding 2 sections where the gantry joins together.
I would want smoother X axis movement so was looking at ball screw rather than trap screw but this means changing both ends and making new mountings etc, then I would have to change the rails etc so was thinking of getting another machine instead of putting so many parts into this one.

What are your thoughts ?

With a new machine I would probably want something built by a factory rather than spend the time to make my own.

Would want taller gantry for cutting a min of 100mm deep, want vac bed for holding pieces as we normally cut letters for signs,
would want decent ball screws all round.

I wouldn't mind an older machine as long as it was heavy duty with decent parts.

???