I recall seeing a video that JDJ made. where she finishes a block and then uses a 1/4" foot and sews around the edge of it and uses that sew line to cut along and that creates her seam allowance. If there are no seam allowances in the pattern you are using...I would suggest you use her approach as the way to go. Just keep everything consistent and it all should work out in the end. I made a top recently and used 1/4" and it went together and the pattern had a lot of matched intersections. I know that there is a lot of talk about her directions being poor, perhaps they are a bit vague but I am FAR from experienced and my second paper pieced quilt was one of J. deJonge's fairly complex patterns and if I can do it...anyone can. Just do not get ahead of yourself, keep everything organized, cut fabrics as you go ( possibly creating templates), use batiks and then there is no right or wrong sides to consider and what results!