Hi guys I need some help with my craft. This is my first boat so it is a BIG learning curve for me. I have a few questions, hope someone can help

A: What should I pack the drive shafts with? oil grease?

B: I have a couple of motors they are 380's, do I need bigger motors? or gear reductions? or both?

It is about 6 feet long and has 2 X 50mm 3 blade props. I am not looking for speed, more of a scale speed. Will they work.
Any help and advice would be greatly appreciated