Yes I would because you have little choice. Just like you, I also don't live in the USA and suffer the same problems when I need to return something. The guys in the USA get it easy but that good luck to them.

If you decided to move to Mars should all the vendors pay your shipping charges??

20 years ago it was difficult to find vendors in the USA that were interested in shipping internationally. Now everyone does and those of us outside the USA benefit. The shipping on warranty items is just the price we pay.

In any case I would be having a real close look at your engine and set-up for any other sign of vibration. The failures you have are unusual and make me wonder if there is a vibration issue.