Step 8: Try it out
Check the fit. The template should get you close, I didn't have to do any additional trimming. If it can't be smoothed against the inside of your windshield and still wants to buckle, take the sunshade out, trim a little from the edge, and try again. Don't get aggressive on the trimming, if you remove too much a gap will be left for the sun, so take it slow and easy.
Now you should have a sunshade that: fits your vehicle, requires less wrestling, and does a better job of keeping the sun out. Enjoy!