As I am sure you know, Don, there actually was an SBF, looking something between an FF-1 (or SF-1) and an elongated F3F (
http://www.aerofiles.com/grum-xsbf1.jpg). Sure would love to have FG come out with one of those! After they do the updated redraw of the SBD, of course!
Don II
PS: Thanks for the info on the card thicknesses for your crew figures.