Kodak also made a stack loader for the Carousels. I bought one shortly after getting my projector. They have the advantage of not having to buy carousel after carousel, which was expensive. The disadvantage was you could not reverse the slides. I then bought a couple of Logan metal boxes which held about 1000 slides or some such number, and you had to take out about 30 slides and hand load them into the stack loader. If I bought carousels, I would have a pile of about 15 of them. The Logan boxes are about the size of a shoe box. If you can find one on ebay, pick one up. I think Logan boxes are still made. Ric.