Tim+ wrote:

How about a diamond tipped screwdriver blade? Apply a lot of pressure and
who knows, you might get lucky.

http://www.screwfix.com/p/wera-bitor...5-6-25mm/86103

Not too expensive either.

That's an interesting thought, and as you say, cheap enough to
try.

Chris
--
Chris J Dixon Nottingham UK


Plant amazing Acers.