When I first started quilting I didn't square my blocks and ended up with some pretty wonky quilts. Now I've seen the light and square as I go along. Shouldn't be a problem with the blocks you have but a word of warning: Be careful not to cut off points when squaring. The first time I squared I whacked the points off most of my triangles. YIKES! But we learn as we go and I'm still proud of that quilt.