Not a problem, MomG! You have a couple of options at this point. You can go ahead and cut your setting triangles to the size that Sue states in the pattern. They will be too large for your 14=1/2" block, and too small to make up the 1" difference, but...you can stitch them on and square the result to fit your feathered star, and add a wider floater strip, or....
you can cut oversized setting triangles so that the star floats and square whatever you wind up with to the stated 21-3/4" (unfinished size).
I think that this is one of the coolest things about this complicated pattern. Yes...it requires precision piecing to make it fit like the pattern. But...in most cases, there is a way to adjust the next addition so that everything will fit together. The resulting quilt may not be exactly like Sue's....but it will be a unique creation that you have made, and figured out how to adjust some problem areas along the way
Like Sue said in the first video:
MEASURE ACCURATELY
CUT ACCURATELY
PRESS ACCURATELY AND
STITCH ACCURATELY
for an easier time making it all fit together.
Hopefully, we will all continue on this journey, and help each other figure out how to make it all come together.
WE CAN DO THIS!