Hi Brian, yes, that is exactly the same as my setup.
They are very very tight to the surface. I was thinking of trying to find some really thin piece of metal or something to try and push in between and slide like you mention.
I have never seen any so tight before. They definately have a good attachment method, but removal is so far a big mystery.
I will remove the storage bin covers and get a mirror and flashlight and look up underneath to see if there is a bolt somewhere, but if there is, I would have no way to reach and remove them.
Hard to believe there would be through bolted as not sure how even Grady would have reached way up and especially forward.
I want to remove the forward bulkhead panel like where you have your speakers so I can get to the underneath side of the pulpit. The overhead is lower so can't pull the panel back from top. It has to pull back from the bottom, but the bolsters are in the way.