Tom Glaeser's "plug-in-and-go lower wing mounting system.
Tom developed this lower wing mounting system to save us a poop-load of time and make it super-easy to mount and unmount your lower wings. We've all gone to this sytem and have been using it since 2003 with no problems. We've looked at all scenarios and decided that anything that could happen to cause a failure would pretty much already be a disastrophe in the making. You make the call.
The root end of the lower wing spar has two slots in it
that capture the spar attach bolt and hold it exactly where it has to go. The landing
wires hold it in place. Both landing wires would have to fail for the wing to back off far
enough to come off the spud. And, the only way we figure that could happen is if the
flying wires failed due to the upper wing folding. In either case, the spud coming out to
the spar would be the least of your worries.