With the new Dim native function

For make Diagonal Dim you must use the Cplane
(here materialized by The Yellow face)



More easy to put the tripod x,y,z at the middle of this face



For dynamic Dim just select Object(s) + Dim before Transform! ;)



With these 2 little tricks you can Dim any 3D things! :)

For "Flow" or other Deformations (you can't Separate) the Dims for design purpose till now you must use Dimensions by Max Smirnov! ;)
http://moi3d.com/forum/index.php?webtag=MOI&msg=7403.133