The3rd Earl Of Derby wrote:
chasers are on the market besides the angle grinder type and the good
old bolster chisle.

Reason being I'm bored as most of me DIY work is done and I have an
idea that If I can come up with a good drawing of it this could go
into production if I have the inclination to carry it forward. :-)

I'm suprised nobody in the ideas tool industry has thought of this?

Go on make me day.

Forget it. :-(

The device in the URL is something along the lines I was thinking of but
with 2 adjustable width blades a bit like a tobogan sleigh with the 2
blades opposing each other in a forward and backward action.

The one in the pic uses two diamond rotary blades.

http://www.screwfix.com/app/sfd/cat/...0996&id=81200#

Ha well there goes me bridge. hmmmph!

--
Sir Benjamin Middlethwaite