Quote: (Originally Posted by
PhilSiswick)

Hi,
And as a supplementary question, having spent an age wrestling the o-rings out - where in the UK can I get metal dental picks as recommended by Jetsam (without resorting to stealing them from my dentist ;-).
Cheers,
I actually got some from my Dentist. I just asked if they had any broken ones, they showed me a pile of them and said I could help myself. I walked away with 6 of them (a couple for some buddies).
They are broken on one side only, and even then, some of the breaks are very minor - bad for teeth, but fine for o-rings.
As for the knob position, I was taught that the halfway position is easiest on the o-rings during my initial training.