I have a Silhouette Portrait, which is the smaller version. I used it to make decals for some classic Stern drop targets, but haven't done stencils yet. I may try to repair my Space Shuttle pf with it. This is some good info here.
One concern I'd have about using water to slide the stencils around, is having it soak into any damaged, unsealed areas of the wood. Anyone having issues with that?