http://www.McCallsQuilting.com/BBW - Erin Russek demonstrates how to cut and sew triangle patches for the Tree Tumble quilt block, using optional Tri-Recs acrylic rulers. This Block Builders Workshop quilt block is patterned in McCall's Quilting November/December 2015. Click link above for our entire library of FREE Block Builders Workshop videos. Purchase magazine at: http://www.quiltandsewshop.com/catego....