Making a Stencil

I made this sketch awhile ago, you may recognize the design from the Shrinky Dink necklace I had made for my granddaughter.  My intention was to make a stencil with this design.  The day had come.  I shaded in the areas to cut out, this changed the design--it got a little too complicated (I tend to do that), so I had to simplify a bit. 
I cut a piece from an old tinted roll of plastic or acetate, that I had held onto, (I tend to do that), I suppose it once blocked the sun for a  large picture window?  I taped my sketch over the plastic and cut it out with an exacto knife.
To have the stencil temporarily stick to the wall, I bought a can of repositional spray adhesive to spray on the back side--I'd never used this adhesive before, but it helps to achieve crisp lines, (after spraying the adhesive, you do need to let it sit for a few minutes before using the stencil)--also the sticky backing doesn't remain sticky for that long--I found I had to respray with the adhesive each time I used the stencil.

I've always like stencils--I might experiment with more or even cut this same design out in another way?
I recently watched a documentary, Exit Through the Gift Shop, where an obsessive film maker, Thierry Guetta, follows and films street artists--there's more to the movie, but I loved the stencils of "Banksy", a British street artist, who inspired me to finish my small idea with this stencil.