I posted this down under, but thought someone here might find the answer quicker!

A card trick that uses a stack and the Gilbreath principle. I can't remember the DVD that I learned it on, but the deck is basically set up in new deck order. The deck is cut in half and shuffled, cut and shuffled with the Gilbreath principle still in effect. I don't remember what the effect is, but I do remember the word "Rose" in there for some reason. Any ideas?

Much of your description sounds like it could be an effect from Lewis Leval's Paint the Roses Red.

That's it!!! Nice job figuring it out!! I'm now going to start practicing it, I just needed a memory jolt lol

Harmony is such an awesome effect that seems so impossible!! Highly recommended!