CL415: The stock moter just fine, you'l be do'in rolls an inelmines, inverted (even on floats!) . theres a thead or post about a fella use'in floats in snow, anyhoo, I find any plane flys better with the Cg forward the aft as when you get her back you can move the cg by move'in the batt's(velcro in plane an on batt's) till you ger right, Keep your batt's in a wide-mouthed cheap plastic thremos till you need em! your bub. steve