No problem David, happy machining.
Note you may need to tune the z axis soft stop relative to your bed, and spindle or router and presuming you have a spoil board...
Consider this that your z axis has 82mm of travel, but by the time you have a router or spindle in the tool holder, and a downward projecting chuck, and a spoil board on your bed, the effective travel distance will be less... Then you add a cutter to the spindle or router, now your z axis travel is very much reduced
Hence if you told the machine to decend 80mm it will most definitely crash into the spoil board
Hence you may need to tweak the soft limit for the z axis, to something like 1mm below the spoil board with a cutting tool installed.
Someone may be able to give some better guidance, because I'm sure that you could via script reset the z axis soft limit every time you install a new tool, and use g31 to set tool offsets
Rob