Cluck Cluck Sew の Diagonal Seam Tape™

Stuck it on the front plate of my machine and my diagonal seams finally line up without me drawing pencil lines first. The tape is thin enough that it doesn't throw off the fabric, and it's held up through several quilting projects without peeling.

I was skeptical that washi tape could actually hold up as a seam guide, but this stuff is thin enough that it doesn't bunch up under the presser foot and it hasn't budged after weeks of quilting. Lining it up on the front plate makes chain-piecing half-square triangles so much faster.

I stick a strip of this along my machine plate and my diagonal seams finally line up without drawing lines first. It holds tight through a whole quilt top but peels off clean when I want to move it. Way better than marking every square with a pencil.