Assembly question

[Mchelem]

I read a tip on sashing your rows together ( the long ones) and making sure it lines up with the row above it.

Sew the sashing to the right side of all your blocks, (except your last one, ie 11 blocks, 10 sashing strips) then join that sashing and the next block together, creating your rows.
Then, starting in the middle of row A, and the middle of row B, line up the sashing only, making sure it all lines up and pin the middle of the sashing and each side (where the sashing and block come together) Skip any area in between for now and working out to the left (or right) line up each sashing area on your rows, and only the sashing areas, and pin. Once you get to the far edge, work your way out the other direction, making sure each sashing lines up. Once you have your sashing lined up you can stretch or ease in any area in the block itself , in between your sashing lines, that needs to be, and pin those. When your rows are sewn together, all will line up....(I hope that makes sense. It's 5:30 am, the high school kids in our hotel have been roaming the halls all night and my head is pounding behind my right eye)