In reference to your comments...
like a DIY section, instead of being buried in resources which have also conversations compairing parts...
Under
Tech Talk there is a DIY section featuring writeups, and a Product Reviews section. The DIY posts quite often have other ways of doing the same thing, or more commonly a bunch of posts saying 'well done' which isn't entirely a bad thing TBH. The Product Reviews quite often have talk about various competition products if there are any, and why this one is or isn't better than another.
...section for people selling stuff/parting out cars.
Under the marketplace, go to
Prelude Parts For Sale and the fifth option down the page is
Part-Outs
quote...just a thought though.
That's great, thinking is seriously encouraged

If you've got anything else you'd like to raise, don't hesitate to contact me or any other of the PreludeZone.com staff. Keep us posted on your progress, it's not often anybody tries to fit another bumper to a 5g, and I'll be looking forward to seeing yours finished.