Galimex, I think the point is that such plans do not exist, and the folks in this thread are discussing how such a pit should be built.
For the person who asked about building a collective, I have started with an X45, you can see the idea here: http://pitblog.radsy.com/archives/00000147.htm
I'd also recommend to all interested in a BS cockpit to check out ViperPit and Hovercontrol, both very active pitbuilding resources. Between the pitbuilding knowledge at ViperPit, and the helo knowledge at Hovercontrol, you'll have everything you need. :thumbup: