?http://www.radio-astronomie.com/pdp8.htm
That looks very nice. I know people who cast plastic at home, but his
results look amazingly clean.
This was posted by the maker himself not very long ago, after which I bought all necessary
material to do it myself. I guess I should get going before the clay dries up :)
It has also been done for a straight eight, but I can't find the link now.
/P