Also, I leave extra zipties in my bags so that after TSA check I can zip them up / and or TSA can zip then up.
I put "suspicious looking bits" in ziplock bags or other plastic bags and clearly mark the bags with what they contain. This way I can save the TSA dudes from gearing up their imagination. For example I help them think "underwater camera housing o-ring grease" or "camera lens zoom gear" instead of "uranium enrichment plant parts".
I separate parts into different bags. For example, I take handles off housing. For the clemptomanics that open the bags an "entire" housing looks much more sellable than a bunch of parts that they would have to figure out how to put together.
Edited by Marjo, 24 July 2012 - 06:15 AM.