That's my vision exactly. All the knowledge you would ever need is already out there, probably on page 17 of some forum post. But it'd be a huge to have it all in one place, easily accessible and most importantly, be able to confidently say that it's accurate (the wrong torque on a head bolt could be a $x,000 mistake).

Creating a database schema that reflects the manufacturers model naming and options decisions is indeed a complete pain but we're grinding through that.

I like your idea of finding a small number of the most passionate enthusiast subcultures and growing from there. Would love to hear more about how this app could help you. I'll send you an email.