We have created a "child board", which is SMF fancy-talk for "sub-forum", for Cosplay Tutorials that are relevant to Warhammer 40K cosplay. Things like Ronan Angelos' shoulder pistol assembly, for example. That forum is located in the General Costuming board, if you can't see it on the index page.
If you have a tutorial that you'd like moved there, please send me a PM or reply to this post.
Link -- http://obscuruscrusade.com/forum/index.php?board=13.0