heres another touch
Mark the amount of stock you want to cut of, leave a 1/32 to 1/16 of an inch so you can use a 10 inch sanding disc to true up the end of the stock, that way if the saw had walked while cutting everything will be true with no swells or gaps.
Position the pad on the stock so it has the best position possible, that is low enough so that the toe of the pad can trimmed to follow of the line of the stock.
Scribe the outline of the stock onto the pad. being carefull so you don't touch the stock with the grinder of choice, cut the heel and toe of the pad so it has the lines of the stock.
Now remove the pad and grind it to the scribed line, being careful not lose the lines of the heel and toe.
If free handing it this way is to difficult, Brownells sell several grinding jig to help hold the lines.