I negotiated everything in my world where I got hovers and I got the extra 3. Idk.thank you UBERhelp for this guide!! i got hover in my EN5 city thanks to your guide!!
though i negotiated all of joy danba, i didnt get 3 extra hovers, in my theory theres a possibility you dont get the 3 hovers if you negotiated oumee
but still, having 1 hover is enough