I decided to use the default Three finger drag hence, as a knock-on effect, my BTT gestures grew in number to accommodate the disabled default gestures.
NB: I haven't decided where to stick the 'lookup word' feature since the three finger double-tap causes so many problems. I'd also like to add the 'close window under cursor for use in expose' but it interferes with the close windows/tabs in regular use.
BetterTouchTool Gestures:
Global
Three Finger Click — Middleclick
Three Finger Tap — Middleclick
Three Finger Double-Tap —
Lookup word under cursor
Four Finger Swipe Down — 3 Finger Swipe Down
Four Finger Swipe Left — 3F Swipe Left (Page Back)
Four Finger Swipe Right — 3F Swipe Right (Page Forward)
Four Finger Swipe Up — 3 Finger Swipe Up
Four Finger Tap — ⌘⇧M (
Menu Everywhere shortcut)
Four Finger Click — ⌘W (close tabs/windows)
or Close window under cursor (works in expose)
Five Finger Click — ⌘Q (quit app)
Five Finger Swipe Left — Move right a space
Five Finger Swipe Right — Move left a space
Five Finger Swipe Down — Application Expose
Five Finger Swipe Up — Mission Control
Five Finger Tap — Application Switcher
Firefox
Four Finger Swipe Down — ⌃⇥ (switch to next tab)
Four Finger Swipe Left — ⌘] (back)
Four Finger Swipe Right — ⌘[ (forward)
Four Finger Swipe Up — ⇧⌃⇥ (switch to previous tab)
Pinch In — ⌘- (zoom)
Pinch Out — ⌘⇧= (zoom)
Safari
Four Finger Swipe Down — ⌃⇥ (switch to next tab)
Four Finger Swipe Up — ⇧⌃⇥ (switch to previous tab)