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Not trying to help you dig more but why would you say that? Guys got a business building engines. If he doesn't build engines he doesn't eat so to speak. Tricks a builder uses sets them apart from other builders. The better ones stay in business the rest don't.
I know some very successful people on both sides of this dilemma, 1 shares pretty much every single thing he ever does, and he's insanely popular and booked for months and months out because it's one thing to have the info, it's another to have skills and experience. The other doesn't share anything, like you mentioned above, and is just as busy/popular.
I don't think it matters much, this isn't formula 1 tech we're talking about. But I can certainly respect both approaches, and I would certainly encourage everyone to spend money with a hands-on vendor like Andrew who actually contributes to this forum and helps out very many people.
Cornball move for the engine builder vendor on here to not discuss bearing clearances, but w/e I'm already in negcat territory.
I think I'm entitled to not share the bearing clearances I've determined to be ideal, based on spending ~$20,000 building, racing, and analyzing my own personal race engines in the last ~8 years (that's $20k in engine parts and costs, not counting the endless stream of cash spent on competition and racing and the literal thousands of hours of my own time). If not for the sole fact that it's my R&D dollars and my intellectual property, then certainly because I've been a contributing member of this community for a decade with several good build threads and stickied how-to threads to my name.
Forgive me for not spoon-feeding every bit of my knowledge to you.