I think I would be more worried about the attachment of wings and connection of control cables of a sailplane, which are designed to be readily taken off & stowed in a trailer, let alone the assembly of one of those Rogallo wing things!!!! Percival Proctors outer wing attachments were designed for easy folding as were many DH types, & Miles too.I don't think I would ever be truly comfortable in a wee plane with folding wings. If the clip, or bolt, or whatever it is that secures the wings, fails, then you are in a spot of bother.