http://guide.lugnet.com/set/?q=420_1&v=z http://guide.lugnet.com/set/?q=420_1&v=z I think this is an example of a very early set using this technique. But yes,

http://guide.lugnet.com/set/?q=420_1&v=z http://guide.lugnet.com/set/?q=420_1&v=z I think this is an example of a very early set using this technique. But yes, this is possible and holds rigidly