That first pic looks like the floats are too far back, or is it just the angle of the picture. Your step on the floats should be about 1/2" back from the CG of the plane. The tips of the floats should be around 2" past your prop. If your floats are back to far that is why you are so tail heavy. You can get the 6 oz spray can of CX thru True Vallue Hardware stores for $9.95, my local store had to order it for me as they did not even know what it was. It is listed in there store order book under lubes and oil, I had to call CX to get TVs part #. You then need to empty the spray can into a jar. I just put a lillte hole in the lid to put the spray straw into then plug the hole when the can was empty. I have been using the same jars worth for 3 years now so it will last a long time.