FYI -- Van's has four very nice "How To" videos on the Van's Aircraft website concerning the installation/fiberglassing of the canopy on the RV-14. Look for the videos under the "RV-14" section. While not exactly the same design concept as on the RV-12, these RV-14-focused videos offer some excellent guidance that is applicable to the RV-12 canopy as well.
www.vansaircraft.com/public/service-rv14.htm
www.vansaircraft.com/public/service-rv14.htm