Modular storage system with an active storage level feature

A storage system comprising:

• (a) a plurality of support posts;
• (b) a lower frame assembly mounted to said plurality of support posts;
• (c) an upper frame assembly mounted to said plurality of support posts;
• (d) an active-level storage unit supported by said plurality of support posts, wherein said storage unit is slidably movable relative to said plurality of support posts;
• and
• (e) and anti-tip assembly secured to said lower frame assembly including:
• (i) a guide tube secured to said base assembly, and
• (ii) a leg partially disposed and slidable within said guide tube in cooperation with movement of said storage unit.

A support assembly comprising:

• a post having at least one pair of radially extending flanges formed along a length thereof, said flanges defining a longitudinal slot therebetween, and
• a post insert having an array of mounting slots formed therein, said insert being disposed within said longitudinal slot;
• and
• a cam-lock assembly for securing said post insert within said longitudinal slot,
• wherein said cam-lock assembly is rotatable to bear against opposing interior surfaces of the longitudinal slot.