Hi Michael, the current PBI card as shown is 6 cm tall not counting the edge connector towards the XL. I think the idea for the XE version card was to support PBI pass through as I have seen on other cards, so given that, I think that would preclude fitting in the Realan Mini-ITX gaming case.
Having said that, I would like to support the XEL/XED efforts if possible but it is a little early for me to make a commitment on that yet.
Glenn