Honchey...I did as you've shown for the y seams except clip the fabric. Instinctively I wanted to but was afraid it would cause a problem. I'll do that with the other half of the D&D block. I bet there will be no puckers. Thank you sooooo much.
QuiltE...no barn quilts here. I'm too busy trying to get my family covered to worry about that right now.
QNS...that little bit of length should fit right? After all the first board probably did but then the window curves a little and the next board is the same length. I guess that's why they made pickups. Sometimes us "can do girls" just don't know when to call it quits! But the bonus is the LQS's will have the pleasure of your company and I'm sure you'll find some winning fabrics.