Also,
some saws have a flat curved piece of metal just behind the blade which
follows the blade through and clears sawdust from the groove [I *think*
that's what it does, unless anyone knows otherwise?].

I thought it was to help stop the blade binding during deeper cuts - but I
may well be totally wrong!

Alex


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.495 / Virus Database: 294 - Release Date: 30/06/2003