I don't know if this counts, but I replicated the mercury redstone using the mercury atlas DLC parts. I have a fully functional Delta IV heavy saved in case if it doesn't.
I've color coded the rocket to be *quirky* and *unique*
Silver: Side Boosters
Stripes: Core Stage
White: Payload
(Edit): The video isn't loading, so click the "watch on youtube" button
I already verified the integrity, so I didn't know what to do. Worst, I couldn't find UI Tools, so I was basically clueless. Thanks to you, I can use my mods again! :D