I have a good condition manual for building and operating the DH-500. It was used to build from kit (many years ago), there are some hand notes and check marks through out. Comes with a 16" x 21", full scale, pictorial diagram with black-n-white photos on the back side. Manual consistently ebay's for $30-50 without the diagram poster. Thought I would offer it here before taking it to the 'bay.
Price includes shipping (Cont. US) & PayPal. If your local or use check, I'll take less. If your international, please PM me, I'm sure I can get it to you.
Thx,
Dieter
