"He who marches out of step hears another drum." ~ Ken Kesey
What size is your "standard?" I know that I have a few. 4" is the biggestHere's what they offerhttps://heatpress.com/products/cap-4x7-standard-curved-form
You're talking about the cap raising up a bit off of the platen in the center? What about the hold down, can you increase tension?Have you tried a pressing and had this cause an issue?
won't the gaps in the steps cause a slight area where the patch won't be getting the same pressure/heat?