When I make piano bars I take pics of the fabric placement so I don't get lost. LOL
Then when I sew the strips together...first I start with pairs and then add the
pairs together until I have about four long strips (for one side). I measure
and compare it to my border length and then I make a few adjustments
until I have two pieces left and make the final adjustments. In other words
don't trim too much until you are close to the final border. Does that make
sense?