Phil, my only experience is with the slimlines where the mechanism seems to be made of italian cheese. *Slightly* too much pressure on the nib and the extensions mech spring goes bang. I do get some interest in pencils but without a decent mech I usually try to sell the workshop pencil. Of course, their 'indestructible' lead is anything but ... but they are the best of a bad lot.
As the Yorkshire war-cry goes: 'OW MUCH?!?!?!?!
Bl**dy 'ell, they must use 18k gold somewhere in that thing!
:nonono::nonono::nonono: