hello i've been looking online to find out how people resize their brush on the go instead of using the side panel. came across this python script, but cant seem to get it working properly. i've unzipped it and placed it inside the plug-in folder within the gimp directory as instructed, activated it with a shortkey in gimp, but get weird results, it seems to give a jittered effect instead of effecting the size. have i done something wrong? any help would be great. using windows 7 64 home.