Venal, I've been thinking about Piett and your suspicion about his suspicion, and I guess you could be right that he would be suspicious since they are expecting this exact thing to happen. I forget that the trap had been set a long time ago, and he may want to hold them to cut out that part of the trap that could fail (Piett being the pragmatist that he is). Of course, in the end, Piett is right. I love Piett. Have you read how one of the ideas on this thread was for Piett to be a kind of tragic hero who also has a change of heart at the end and deliberately rams the Executor into the DS after the DS starts "firing at will" and hitting Star Destroyers along with Rebel ships? It's one of my favorite ideas that would be hard/impossible to do, along with sacrificing Lando.

I'm not sure changing the shuttle type for Tydirium would be that hard, its in one or two mattes and a handful of shots against empty space or scenery that should be replaced by Angel mattes anyway. I think Vader should have a plain white one and the Emperor should have the stripe on the front be more obvious or have more stripes (remember the different Lamba-class shuttles in TIE Fighter?)