Those are some real scopes, Alexander. I've got a 16" waiting in the wings to start on, but I've been playing small in the mean-time.
There's a couple of sub $100 4.5" f/8s, the ball one being the "PortaBowl". A 4" f/6 beater scope "Frank the Tank". And a 6" f/5 called "Frankenscope".
All good exercises, but I really need to buckle down and make the practical biggie... - j
http://home.comcast.net/~jayscheuerle/stick.jpg
http://home.comcast.net/~jayscheuerle/portabowl.jpg
http://home.comcast.net/~jayscheuerle/frank.jpg
http://home.comcast.net/~jayscheuerle/frankenscope.jpg