Did you know that since the release of MS3D version 8.00 it is possible to add or edit block model variables without having to recreate the model or clone it?
To do so, just access the Model menu, and select the Model Manager tool. Within the tool it is possible to create a new block model, edit the variables, change minimums and maximums, add and remove variables.
In addition, it is also possible to create models restricted to an area (Compressed Model), create surface files (GSF). The tool allows you to import variables from an ASCII file or from another MineSight project, either when editing an already created model or when creating it.