Jim,
...make sure your grinder is at a comfortable height for you,your arms should be near 90 degrees when locked to your sides.
Also,practice taking a blabe all the way through to finish, as noted earlier it is easy to get them too thin in the coarser grits.
Have fun!!!
OH!!! One more thing....If you have a disc sander make sure the spine is nice and square. If it isn't and you true it up on a blade that you have already ground you may be suprised how even you did manage to get the top of the grinds.
