String height question

[Shoeman]

I unwound the string and used the timber hitch to lengthen it.  First try resulted in 5" string height but the knot looked a little iffy in the nock. So I retied it a bit shorter and got 6" with a better looking knot/nock arrangement.   It looks  much better when braced now.  If it's not raining as predicted in the morning I'll give it a try and see how it works.   It's dark here by 5:00pm this time of year so no bow fun for me after work.
Thanks to all for the help!

[Hrothgar]

Shoeman, I've had to let out string before and ended up with an "iffy" looking knot. What I did, and you might consider, is tie a short piece of artifical sinew (or dental floss, string, etc.) around your loop knot and wrap it an inch or two down the string and tie it off. Just a little insurance in case you think the loop might slip.

[Shoeman]

Good idea.  Thanks!