great tutorial, thanks for the link!
Ghettohound, no such thing as a stupid question!!!
I trim those at an angle, myself. There is going to be another 1/4 inch seam, so when that seam is sewed, my seam allowance is "almost" 1/4". reduces bulk. my trim is 1/16 - 1/8 at the seam tapering up quickly to 1/4", a cut of about 1/2" long on the diagonal.