Thanks for the post. Starting point.
How are you select the scroll value? For example, on the thread's rp the Dynamic Panel labled "Back" is -[[Window.ScrollY / 8]]. I'm wondering how you selected the value 8. Did you guess, then trial and error. Or are you aware of the scroll speed based on the value?
Moreover, if a higher values decreases the scroll, then at which number does the scroll "stop" or "reverse?" Does it become infinitely slower or can the Y value change DP scroll's direction? I'd like some DPs to scroll in the reverse direction. The highest I've tried was 22,222 and the lowest was -10