Space Horizontally, but taking into account line width?

[Figmatt]

• I have lines of varying thickness
• I'd like to space them horizontally (easy with Space Horizontally command)
• But I'd like to take into account line width so the visual gap between each is equal

Is this possible? Is there a trick or workaround?

Here's an exaggerated example:

 

[firstdefence]

I think the only way to do that is to expand the stroke. and then space them horizontally

[Figmatt]

That'll do! Thanks.

Less than ideal, but it'll do.