Dynamic Stretch and Array

[Anonymous]

I have a block that is set up to stretch to certain points using distance parameters.  I'm trying to add an array function to this where I can drag the stretch point as far as I want and it will array once the block is stretched to the max.  The problem I'm having is with the array, it is arraying the stretched block and not the original block.

Example: Block max stretch is 21', I want to stretch my cursor 52', so I'd want this to stretch to 21', array with original block, stretch new block to 21' (42' total), array original block, stretch to 10' (52' total with three blocks connected).

Block is attached.

[Libbya]

I don't know of a way to make it limitless.  If there is a functional limit, then the following will work.  I show how to make it for 4 full 21' sections but it can be modified to add as many as desired.  For each additional section the appropriate values need to be added to the Distance1 parameter and the two lookup tables.  

[Libbya]

Here is a version that is less automatic in operation (two grips for stretching) but can be stretched infinitely.