Hi all. I recently bought an Omega D3 only to find my EL - Nikkor 2,8 50mm doesn't slide into the enlarger housing using the flat Omega D3 50mm lens holder plate. It works however with another lens, a Wollensak 50mm Raptar, which however, delivered results marginally better than if I had reverted to the bottom of a Coca Cola bottle. Obviously any EL Nikkor cannot be used with this Omega D3 sputnik. Any suggestions?