Thank you. That was very helpful. I believe the Campbell Randal manual recommends an awl size the next size bigger than the needle. I had been using that combination but find your recommendation of one full size larger produces better looking stitches. I am wondering what adjustments you think might be made to get the bottom stitch to look more like the top without running an overstitch wheel over it. Lately I have been using waxed Tiger thread in my machine instead of either polyester or waxed linen and the only issue seems to be increased drag on the shuttle tension. Anyway thanks for all of your knowledge.