the speed of the model is directly tied to the fps. 1.3 had frame skipping and was more consistent at different fps’s, but would cause models to explode and have weird behavior if u had any lag. i reverted the frame skip change in 1.4, so now the speed is tied to the fps again. If your not having any weird jittering, you can probably just change the fps to whatever in the settings without much issue.
And yeah, ive gotten a handful of reports of weird behavior or 30/40 series cards. not sure what thats about, drivers can be weird.