I'm thinking of buying a boat, either the turbo vee or aquacraft hammer, while towerhobbies has a save 20 on 150 order right now. Not sure what I should get....The hammer, which I hear has more room for upgrades or the turbo vee. I want one of these two so that I can use the 6-7 cell batteries I already have. I dont plan to go 8-cell. I have a 12 turn D5 flatliner motor I could use, but have no clue about what size prop to use and upgrades, ect. any help appreciated!