if i were making one, i be tempted to put it on, then like you said, if you decide you don't need it, you can cut it off.
i got careless when sewing my ray way quilt & made the draft stopper & the quilt it's self more narrow than i had planed.
on some of those cold winter nights i have wished both were a little wider when i rolled & felt the cold air<g>. ...tim
don`t leave the CREATOR out of the creation!