Hi mdesign,

re:
> Blocks helps also modifying screws for example or boolean cutters (holes for screws).
> So it`s possible to change every screws in machine with one modification and every
> screw hole with second modification (boolean cutter edition before cutting holes).
> So it`s kind of pseudo proceduralism/ parametric operation.

Why not use a parametric CAD program for these tasks? They are specifically designed around doing these types of things.

- Michael