Originally Posted by
joe'smom
That would seem to indicate that the point accounts for 1/8." I wouldn't worry about it; as long as you have the right size HST and the right size wing, you're bound to come out ok.
Points on half square triangles of every size with a quarter inch seam allowance should account for 3/8”. If you have the die for the finished size of the HST we are making (finished size equals measurement BH gave minus 7/8”), you can cut a template with paper to use to test your measurement.