[TenTec] Background on Delta 580?

[nz7c@cox.net (Tim)]

I cannot find any information on the Delta 580. QST does not seem to have a
review in their files and the Unofficial TenTec pages do not fill in too
much. Can any one tell me how successful it was? How long it was on the
market? What good or bad characteristics did it develop a reputation for?
How did it compare in size to an Argosy or an Omni C - somewhere in between?
Parts still available?
If anyone is familiar with the rig, your thoughts would be most appreciated.
73/Tim BZ7C