Stairs and Dblocks

So, In this drawing, I have 2 blocks. Stair, and stair section. The one I'm working on is stair section.

What I have is the base of a block that will automatically add steps to the desired height, at a 7" rise and 8" run. I have the array function working correctly. It is inserting correctly, etc.

What I'd like to do is to be able to stretch the frame by typing in the final height of the stairs, and have the length and treads adjust as needed. I'm sure that there is something in the xy parameter actions that I can use for this, I just don't know what it is.

Thanks for any help!

File003.dwg

Link array parameter to a look up table if you give it a list of pre defined heights ?

Not a direct answer to your question, but you can find a different strategy for Dynamic stair sections here.

http://forums.augi.com/showthread.php?t=55204