I just did your air deflector mod.
Well done on the design, and especially posting a pic of the template on scaled paper. I took the file on a jump drive to Staples to get printed. Trick we used was to scale the pic down to 91%, that made it very close when printed, then I cut it out, used that to trace the design, and cut my material.
Used plastic report covers from Staples as source material, as there isn't the resources around here for proper sheets unless I went to the city, which is a couple of hours away.
Thanks for sharing!