Hey @Resonance,
Great job on the template it looks great, and the functionality you managed to accomplish natively is pretty cool. What you are trying to fix is not possible, mainly because you can’t add dynamic number of slides on a slider inside a collection page natively. The number of slides you put on the slider has to be the same on all collection pages. An easy fix would be to just have the same number of images displayed on the slider for each collection item. Another option, and I don’t recommend this one, is to have multiple sliders that are displayed based on the number of images, for example 4img slider, 6img slider and so on, that is possible natively. I hope this helps!