On Mon, 01 Jun 2009 04:02:00 -0700, Andy Dingley wrote:
* No-spanner nuts, with a hinge-out "key" for disk changing.

That's the thing I've always found with the cheaper grinders - they come
with a tool to get discs off, but not one for removing flap wheels (which
need a spanner of sufficient thinness to fit between the flap wheel and
the grinder - most are too thick). First thing to do with a new cheapo
grinder is to make a tool for removing flap wheels... :-)

* 3M's triangular sanding disks. These avoid the edge-crescent problem.

Interesting - not come across those. Will have to take a look...

cheers

Jules