I don't know if I did something wrong or if this is a bug, but whenever I try to control IR parts, it keeps getting a "whiplash" effect if I switch direction abruptly (e.g. opening and closing hinges). It would behave absolutely normal if I just wait for a bit before changing direction. I made a short clip to demonstrate that:
Here is the list of mods I used:
along with IR 3.0.0p7 and KJR (yes, the version from the first page)