4th axis brake enquiry

[m_c]

How have people solved this problem before?

More torque or more braking :)

Only real solutions are, a bigger motor, more gearing (could go to double belt reduction, or screw and pinion), or add a brake.
1st is likely to be the most expensive.
2nd you lose speed.
3rd you need to consider programming it (typically done through custom M-codes)

I was asked to make copies of two sandstone statues from a building in Glasgow from photogrammetry captured models.

Have you posted about this before, or have I read about that somewhere?
I seem to remember reading about models being made from photos in Glasgow..