Rhayles
Perhaps a simpler way would be for substitute the word Set for Locked when thinking about this.
I sometimes have problems with manuals myself (getting on a bit too) and I've got a technical background and kick myself at times

Hope this helps.

Well I've just had this in reply to my query:

Thank you for your email.
In regards to your order we have entered new contracts talks with Pentax as a result of this we have stopped trading with them for the current time so we are unable to supply this product anymore.
Sorry for the inconvenience.

Funny how every reply is slightly different, some offering an alternative and others not. Just the luck (or not)of draw I suppose

Sorry to disappoint you Stefan. When it comes to my photographic creations I become 99% cack handed. My brain seems to go into some sort of a nosedive

I turned out to be 55% left and 45% right.
Proves I must have a split personality

Hello Son. You've arrived then.
We really shouldn't have to communicate this way

Thank's for the welcome chaps.
Don't know about nuggets of information hefty1. More like molecules

Hello all, just got round to joining the forum. I've been reading it for a year or so and thought it about time.
You never know I may be able to pass comment on occasion.
I know I'll certainly pick up a lot of useful info. Even if I am getting long in the tooth