I have used the Beseler and Unicolor bases with the expert drums and the 2500, you know the one where the 4x5 sheet is put into reels. They work fine, but I think the 1500 is too thin and wont roll.
But not everything is lost Jan. Open the motor base and you will se you can remove the wheels that turn the drum. Take them off and add rubber bands or something similar to make them of a bigger diameter.
You will probably have to file the opening in the plastic box to accomodate the bigger wheels. Put the box back on and you will probably have a good enough base for the thinner drums.