[TR] completely off topic

[Randall]

> The 
> grit size used was more of granulated sugar size sort of 
> 40/60 grit size at a guess.

Does seem to be a lot of variation in recommended grit.  Most of the sites I
found selling "spark plug" media don't specify the grit, but the few I found
ranged from 80 grit
http://goo.gl/hp0K3
All the way to 600
http://goo.gl/Dtd2N

Obviously doesn't prove anything, but 100 grit clearly falls in the range.
Randall