Walt, I use either MS Paint or a freeware version of Photofiltre. But anything will do.
Here's what I've grown fond of doing at this final tillering stage. I've done this since I read Dean Torges' article on balance (
"Tillering the Organic Bow" ) earlier in the year. I like to measure the halfway point on my bows and use that as the fulcrum. Then I like to measure the half way point on the string at full brace and use that as my pull point for the tiller tree. Then I tweak tiller until it is perfect. The tuning will tell you where to nock your arrow and set your arrow rest. I have been extremely happy with the results. It makes a bow quieter, easier to tune, and sweeter to draw and shoot. It was the missing link in making a good, shootable selfbow for me.
Whip, you are doing a great job on this bow.
Happy Holidays!
John