"if for whatever reason something does work out then it'll be going back to the manufacturer"

Taking advantage of return policies to cover your lack of knowledge or good planning is kind of unfair to the manufacturer and leads to imposition of return fees and "no return" policies which hurt all of us.

If a part has been installed they can no longer ethically sell it as new and thus take a palpable financial hit in exchange for their kindness in accepting the return. The result is often increased prices which again hurts everyone.

Please think twice before engaging in such irresponsible behavior.