Kodak Slide-N-scan Multi loader

Kodak Slide N Scan is a one-at-a-time scanner. I have multiple sets of slides to scan and wanted to make a loader that I could just attach to the scanner and load the slides quicker.
The housing. that I have will hold 12 slides at a time but it would not be too difficult to make a taller slide holder for more.
One of the problems I found was that not all slides are the same thickness. I had slides as thin as 1.2 mm up 2.4mm so I had to keep tweaking the opening so as to not allow two slides at a time. You may also have to tweak according to the accuracy of your printer.
There is an STL file for hook which you will have to print two use a rubber band to just wrap around the scanner to hold it to the scanner then its all hands free after that. Also print the stand twice .It is slotted to fit into the main body.
I called the part that attaches to the scanner the throat and I glued that to the main body as apposed to printing the whole piece as one. I found that printing as one put too much support in an area that was hard to clear.
If you have any suggestions to improve this design I will always welcome ideas.

New Addition
I added an adjustable gate so it can now accommodate slides of different thicknesses. I would still try and scan the slides that are the same thickness in separate groups to avoid jamming
https://youtu.be/6FAAe560hvE
https://youtu.be/A-XVTvGGiWQ