Review on Optimized Set of 3 Wolverine Negative Trays by Gary Christon

Works great. The presence of racks for sprocket holes can be combined with the presence of spacers between frames, making it difficult to align individual frames and not always aligning them perfectly. If your film is curled or warped, it's a big pain. The best design is where you can put the film, like in the other negative holder I have.