If it's the coaster I'm thinking of, it's probably Conklin Shows' Doppel Looping, a Schwarzkopf looping coaster remarkably similar to the Lazer at Dorney Park.
One thing to be careful of in managing a database is that the coaster in question is portable. I saw it DDM in Tampa in 1996; I rode it in Toronto last fall. Perhaps the best way to identify such a coaster is not by the location where it operated, but rather by the carnival that owns it. In this case, Conklin Shows.
--Dave Althoff, Jr.