Mike - Yee-Haw! That is too cool. I do think you need a bigger spinnaker though...

As for the 21 rig on the Viper - remember that the 21 rig also is a rotating mast. That would mean for the viper either not letting it rotate, or coming with a mount either on the deck or keel to let it rotate. If it is mounted on the keel as it appears is stock, the boom will be pretty low to the ****. Sounds interesting though! Good luck and keep us posted!