Does anyone know of a company that sells a tool for edge truing balsa? I saw one advertised once, but can no longer find it. Thanks in advance, Craig

Creig! Look like you don't need any balsa edge truer at all. I saw pictures of your Pitts S12 and it is awesome plane as Bob said very streihgt one, so just take long heavy ruler and the knife, cut balsa holding knife as perpendicular as you can and save your money.
Good Luck!
Vadim

I use my 4' level and a long blade knife.

Build one from the info here: http://www.airfieldmodels.com/inform...ture/index.htm

I use my 4 foot level and tape 100 grit to one side of it with double sided tape.