Does the center row (adjustable) represent bow or string length?
What I do is measure my bows length, "string groove to string groove", and through practice making strings, I changed those
numbers to coincide with the holes down the middle and what I measured on the bow grooves.
Not everyone twists up strings the same tightness, just the way we are.
So if I were you Howard, I would measure the bow from groove to groove and make a couple strings.
See if they are too long or too short for your bow.
Then adjust your post longer or shorter and make another string.
It will take a while but you will get the hang of it.
ANOTHER BIGGIE IS...After you form your first loop and before you form your second loop.
Place the first loop over a post of some sort and stretch the string out snug.
Seperate the two bundles a couple inches and you will notice the strands are twisted a little bit.
That comes from forming the first loop.
Now hold both of those strands, but do back twists in one of them at a time.
After a few twists look at the strands and see if they are laying fairly straight, if not do more twists till they are straight.
Shouldn't take more than 5 or 6 twists to get them straight.
Then keep twisting in the same direction as you were and do 20 more twists.
If you don't do this, your string will end up looking like a bull rope.
When done and on the bow, you want the string to look like a nice round pipe.
Hope that makes sense.