Feedback on $50 Onan carbs on Amazon?

I recently purchased a cheap Chinese carb because the OE part was on backorder (and still is) since June (for a Stihl pole saw). I have been reluctant to install it. Granted, carbs aren't the most complicated things on the planet, but these knock offs are straight copies of the originals - including any flaws that are in the few pieces they copied into mass production. The manufacturer of the knock off doesn't know why one dimension is what they measured it at (tolerances aren't defined), nor does he understand the materials, surfaces finishes, etc. It is blind copy and that is why it is cheap. Furthermore, it's likely the manufacturing processes are uncontrolled, and quality varies widely. The OE part is expensive because there was a staff of professionals behind its development, it was validated in a certified laboratory, and it was made in a controlled facility (even if it may have been overseas). These are things to consider when placing parts on expensive systems.