[aaron695]

Sorry but isn't two or three cheating? These are not valid ways to connect Lego are they?

[deluvas]

Yeah, that's what I thought too.

[RugnirViking]

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