I love these bags, I just saw this same pattern on one of the quilting blogs and thought how cute it was. Your bags are actually way cuter than what I saw. I am not familiar with your interfacing, I will have to check them out. I also try different types of material for my purses, I have found that heavy curtain fabric works really well as well as lightweight upholstry fabric. I have found most of this fabric at thrift stores and was even given some free at a yard sale. Made 3 purses from free fabric and they turned out fantastic !! Thanks so much for showing your purses.