Hi .. thanks for the tip about CR it seems to have made poser faster, but hasnt dont much for my non-linearity. Nib sensitivity didnt make any difference either really. If I move the pen very slowly by an inch (say using the trackerball widget) I get a smooth 360 degree rotation, but move the same inch at any speed I get about 10 complete rotations. It just seems like theres a speed limit (a very slow one at that) on my pen, anything above that poser goes wild. I havent found this trouble with any other app, so I guess I'm justified in blaming Poser :) Anyway thanks for all the helps.. Best Wishes Barrie.