Top Secret is outstanding. I was in Edinburgh once in 1993 when my ship pulled into Rosyth. I toured the castle, and they were starting to set up for the Military Tattoo. Unfortunately, we pulled out before it happened. I'd love to see it once, before I'm gone. Don't know if I ever will though.
Oh wow. So near but so far. If you can get the chance to see them you will be amazed. They are absolutely outstanding. Fingers crossed you can get to see them as soon as possible.