Thank you so much for the quick, informative reply!
Unfortunately I am in a bit of a time crunch right now, and I’ve found a different way to accomplish what I want, but in a short while I will have more time to go over what you’ve written regarding K2 nodes, because I believe it will be a more elegant solution.
As far as I know there is no way to have the default blueprint node for loop handle decrementing, which is what I need in this case.
Thanks to your comment I did just realize that I can copy the blueprint for loop macro and just edit it, that is probably the easiest solution in my case!