Left handed prop

I have built the old "DanCAM" software I wrote to design my prop blade.
I was hoping to cut a plug for the other blade direction, the left-handed one. The piece of wood I bought has twisted a bit, after being left against the wall, so I will need to measure the twist to take it into account before printing the paper profiles for it. It would be nice to rewrite the propeller part of the software as part of my HeeksArt software http://code.google.com/p/heeksart/