Unlike A-Jay, I can't fit any more into mine.  In fact, when I take a co angler with, I have to take out tackle so I don't end up overloaded.  I find myself fishing solo a lot. 

Mine's heavy enough that I have to tag it to haul it on public roads. 

Ive got a system of stages...

On my Kayak Ive got my blackPak box which isn't too heavy.

Then in the truck that hauls the yak Ive got more of a mothership box, most likely 20-30 pound box with everything else.

Back at the house Ive got everything set up like a d**n tackle shop..

With me finding tackle warehouse a while back, I have been stocking up to the point that I could basically stop buying tackle now, and not need anything else for the rest of my life!