Gear Selector Removal - Help Please!

[Bingly Bingly Bongo]

Any one know how you get the auto gear selector knob-thingy off? I have taken the small screw out or the side and wonder whether it screws off or needs help from a mallet.
Thanks
Merry Christmas Folks

[mick]

There's also a little screw on the front !

[Bingly Bingly Bongo]

Thanks Mick, I'll give it a go tomorrow.