Very nice! I like that you decided to keep laminar flow by making it flush with the front edge of the bumper.
Can't wait to see the final version!
I recently discovered this on amazon and am considering using this to attach future mods
3M Automotive Acrylic Plus Attachment Tape - 1/2in. x 20 Yard Roll, Model# 06382
https://amzn.to/2JIvEyw