One thing I really had trouble with for the Necron army was Night Scythes. They're awesome, cheap to field in mass, but they're a pain to drag around. Luckily Battlefoam had a solution...kind of...
At Adepticon last year BF did this awesome promo of their new Shield Bag line. They gave something like 500 free bags to attendees. I've been using mine for a work bag until I put it together that I needed something to transport myNight Scythes.
The custom trays for a normal BF bag run 31$ and a shield tray runs 17$ and both hold 2 Scythes. Pretty easy choice.
The reason to post this is just to point out to people that might yet to utilize the shield bag. If you need something custom cut, consider it as an alternative to the more expensive standard BF sized bags. The Shield bag could easily hold a 1500 to 1850 army.