I can still remove the A/C and close the window and there will be no evidence it was ever there.
I am sure glad I designed it that way.
It has been raining for most of this week in San Diego, and I somehow did not get the air conditioner fully sealed in the window. A tiny trickle ran down the wall under the air conditioner and after Monday's monsoon, soaked the cushion under it.
It was a pain to remove the caulk, but once I did the air conditioner popped right out. With the window closed, there is no more leaking.
I'll only need it in the summer, anyway.