That spoiler. I even have the materials and know I'm going to make/prototype it
I even have a modification for it so that my trunk stays usable/accessible
Another goal... My super secret $15 easy to apply belly pan. I've been cooking up this idea for about 6 months now and I think I've finally found a suitable material that's easy to apply, should be easy to remove, weatherproof, can take a bit of heat and is available almost anywhere (in stock in many home improvement stores!). It's also cheaper than coroplast and much lighter - but it's not structural at all. And should it just fall off - it won't hurt anything (just make a bit of a mess as it disintegrates).
I've also been meaning to show off my $1 grille block that's just about perfectly formed to my existing grille and doesn't leave any sticky tape residue