I suggest give me as gift, i will help you to test with 10 years, after 10 years, sure no water leak ga la
**shaft dismantle, take out , use double star bearing grease and use finger brush a thin layer and than plug in again and remember the bush not allow too long distance with the copper tube, sure no leak again.
Sorry, can i suggest some idea, if you use a mixer instead of 2*ESC or twin motor ESC, no need to use 14CH, you can use only 4CH controller ti control all movement. hahaha
i not remember the name, is around the middle of the electrical shop street, i remember the motor just place near the solar plate demonstration. Only one shop has this motor , quite easy find.