3 equal doors dynamic block

I need some help with dynamic block. i am trying to create a dynamic cabinet doors block with 3 doors that will always space evenly.

like if you have a 48width x 42high when stretch the width smaller or larger it will still contain 3 equal door.

i know a little about dynamic block and create many block already but with this one i don't even know where to begin. i try stretch parameter but not working, the only one that look easy is scale parameter but when use scale parameter the high also grow which i don't want.

please help

no one know how to do this??

Can you post the file? So we can take a look at it.

start with your length parameter and then add a stretch for each door with a multiplier.

I assume 0,33 & 0,66 should be close enough.

If you don't mind fixed sizes for the doors you can use array (see the attached block).

I'm trying to figure out how to do equal spacing too. Our office prefers cabinets of equal sized doors up to a maximum door size (24" for base cabinets). I'd love to be able to create a block that evenly divided a run of cabinet into x equal spaces that don't exceed 24".

06E base 1.dwg