On Tue, Apr 5, 2016 at 2:49 PM, Marc Juul <juul@labitat.dk> wrote:

On Tue, Apr 5, 2016 at 1:57 PM, robb <sf99er@gmail.com> wrote:
so all we need is a decent 12v deep cycle battery & a "self locking" cylinder.

What's a self-locking cylinder?

I think Robb meant a lock that doesn't automatically lock into the "open" position when you use the key. Or even better, one that is impossible to lock open.