On an A4000 I found that performance was better with phase 5 boards when I used CGXv4 compared to P96. And cgx does a MUCH better job of emulating icon dragging ( smooth as AGA) and pointer movements: P96 makes icons "flicker" as you drag them, and the pointer moved far too much like I'd see in WinUae. Might be your CGX settings, though that wouldn't be too hard to botch up as phase 5 deserved the World Award of The Software Installer That Asks The Most Convoluted and Confusing Questions In Computing History eg " selecting this option to yes will cause ...not to be disabled"