OK JonWWs gravity desktop switcher works perfectly, although as No!No!No!Yes! mentioned there might be - there is - quite a bit of lag, possibly due to loading the background images.

Thinking logically, this might be reduced by cutting the orientations to just two - portrait and landscape. Whilst invert-portrait and invert-landscape are awesome, in essence they are just eye-candy as no apps work in those orientations anyway... How easy would it be to cut the number of orientations down?

Kind Regards,
D4rKlar