What they're saying is the cheap turbo will likely leak oil past the seals, then you're gonna get oil in the engine, or worse, the turbo will fall apart and you'll get the actual turbo parts in your engine. I don't know what other cheap parts you've obtained, but the ebay BOV is notorious for being stuck open or closed and screwing you. Also, same with the ebay wastegates. I was looking at doing a cheap turbo kit too, so I know where you're coming from. But, after you look around long enough you'll realize that it's not worth the chance. Just save up like I'm doing. You can still save a lot of bucks by 1. doing the work yourself (besides tune) 2. research a lot, see what stuff is good and shop around, 3. do it right the first time and not have lots of repair. And dude, especially if you have a built engine. Man, if you really do, you don't want to mess up all that work and money with a crap FI system.