A painter on a 1960-1970 public tv show always said 'ther are no mistakes, just happy coincidences.' In scores of years of pattern making , sewing from patterns and changind them I have learned mistakes if you don't think they are terrible, make your work unique! No one else will have finished a quilt just like you. I almost always include salvage edges when I use regular fabric instead of sheets. That do not use for childrens bed clothes is one less warning I have to put on a label. Feedsacks are now back in style and the printed labes on them is quite desirable. Have faith that you do good work and you need make no disclaimers of mistakes.