DYNAMIC BLOCK ARRAY EQUALLY

[SpaniaguaZ5KLU]

Hello all,

I would really appreciate some help in including a dynamic array of sorts to the block included in the attachments. I would really love to know the sort of step by step process if possible as I am a bit fresh to autocad, but also understand if this may be asking a lot. I'll include a file below that hopefully can better explain what I need help with but feel free to request more information. The spacing between shelves (center-to-center) shouldn't exceed about ~11". I have no clue how to set up lookups which i've seen as a solution to this problem floating around, and I have no clue how to use parameter functions which I've seen @TheCADnoob use in a block that has a function similar to what I would like to introduce into this block. 

Again I realize I may not be explaining what i need too well but hope it comes through better in the drawings.

Thank you for your time, all.

[MMcCall402]

I'm not quite sure how to approach this.  The shelves need to also align with the shelf support increments, along with having a minimum top and bottom placement, yes?

Would all the shelves have an even spacing?  vs say, 2 at 5" and one at 10",  or a situation where there could be 3 at 8" each or 4 at 6" each.

[TheCADnoob]

For that one I used an array (not a dynamic block array) inside the block driven by parameters. 

That wont work in your situation (at least not as easily) because the first element in the array is in a fixed position relative to the structure. With your shelves, you will need to move the array basepoint in addition to the array action. 

Ill have to look into it a little more to see if there is something that could make that work. Also @MMcCall402 brought up a good question.