This model will hold your monix 8x11 mm negatives or slides securely and it sits withing the 35 mm strip holder that comes with the Canon 9000F scanner.
Once you print it you might have a to do a small amount of sanding on the top part of the model that sits on top of the film to have it fit snuggly but not too snuggly with the bottom half of the model.
Good luck with this and I hope you find it useful.