Why are you getting any grief?
People should be happy that you are spending your money and time to try something.
As for a waste of money, well, it could arrive DOA. I do not know what would happen if it did. Even if it arrives DOA and nothing could be done about it, how much did you lose? Money for a tank of gas?

IMO, you are getting grief because other people have their own agendas and what you are doing is not helping. EB