Okay, okay:

http://www.thesamba.com/vw/forum/viewtopic.php?t=228788&highlight=rekey

The screw was hidden by a plug of black wax or something.

Will.

On Mon, 2010-03-15 at 09:46 -0800, Will Taygan wrote:
> Looking at Alastair's blog inspired me to rekey my '82s sliding door
> lock. (PO put in a later/longer handle with a different key)
>
> It looks like a punch(?) being used?  Anyone have a DIY source for the
> tools/parts/instructions needed to punch(?) this out and replace the
> pin/screw or whatever is holding the tumbler in?
>
> http://shufti.wordpress.com/2010/03/05/lock-info/b68vm-2/
>
> Thanks,
>
> Will in Alaska.
>