S800 Reptile Canopy with Vents and Strap Hole

I've made holes in the canopy to glue [DarrenLine's vents](https://www.thingiverse.com/thing:2694611) on instead of having plain cutouts, also adding another small slot to use a strap or a piece of wire to open the canopy.

**Print the vents at 1.5 (150%) scale** and glue them on: the holes are slightly smaller, vents are meant to go _on top_ of them, not _through_ them!