I have 'tested' patterns for different quilt shops. I supply my own fabrics, and I follow all instructions as written. When I find something that doesn't work, I keep track and notify the owner. I received 2 patterns. One was for a tote (which I haven't done) and the other is for a baby blanket using a specific fabric panel. Among the things that I suggested was to not specify a panel because that limits the use of the pattern after the panel cannot be purchased because it's no longer printed. At the end, I was approached by the owner to purchase my sample (the patterns were mine to keep) and I would be reimburesed at my cost. I decided to keep the quilt top. I did however, send all changes that I had to make to the instructions to be able to finish the quilt. Not everyone has the minds eye to see if their instructions are correct before printing. Any changes that you make, I would notify the company listed on the pattern so they could update their website for any changes. Good luck.