Hatch Closures

It may be necessary to open a BalloonSat at the launch site (say to load an experiment or insert a battery). A hatch held closed by rubberbands is ideal for this. Rubberbands can be snapped on and off quickly and with no tools - ideal for the rush during launch prep. I've tested rubberbands on many flights and have discovered they hold up wel for the cold, vacuum, and ultraviolet of near space.