ok i wanted to try my ball head on my new monopod....but it seems to be stuck on my tripod centre column 
I've tried WD-40, giving it to my stronger brother, hitting it with a bit of wood and even swearing at it, but surprisingly with no sucess
(you'd never guess i have an engineering degree would you
)
How can i get it off?
I don't wanna clamp the centre column in a vice as knowing my luck i'll crush it
maybe if i stick wood with grooves in the jaws then lightly use a blowtorch to heat it
then give it a tap with a rubber mallet (in a torsional manner) it may free it 
just plain done up too tight 

