I'm working on a Sunny Lanes quilt top (
http://www.patspeth.com/Quilts/sunny-lanes.html), so I am making lots of 4-patch units and lots of half-square triangle units. They rarely finish at the same size.
Should I trim each of these small blocks before sewing them into the larger blocks (made up of 16 small ones)? Or can I wait and trim only the large blocks before sewing them together to make the top?
What are the pros and cons of each method?
Thank you in advance for your advice!