Stan, when I refinish a stock, I always mask off the checkering with masking tape. I apply it in overlapping strips, press it down really hard so you can see the outline of the border, then cut around the borders CAREFULLY with a very sharp, thin-blade knife.

Do the same thing, but just lift it off and place it on the stock you plan to checker: should work fine.
JR

Be strong, be of good courage.
God bless America, long live the Republic.