Please email me your comments off-line if you have information on these makes. Here are the makes starting with D that have little or no info. Addresses or telephone numbers would help if you have them. Lou Deeter, Orlando FL
DEAN, Nigel: England.
DEKERF: Canada. 604-872-1722.
DONNINGTON: Possibly England.
DONOHUE, Paul: England.
DUARTE: Columbia. Custom. Known to have used Columbus tubing.