I'm always very pleased with the performance of Eolo props.Perfectly balanced unlike ny other brands. I'm using this prop on my FMS supercub with a 6s power system. The power is out of this world and my flight times have increased to over 10 mins.
Haven't got to use these yet but they feel great and seemed to be pre-balanced. Using this on a 3520 780kv.
Eolo 13x7 Electric Propeller