Thanks for the reply.

We flew the plane today on its maiden two flights.Was allmost to windy to fly,and i did not fly it as i don't like wind with these light planes.Had my nephew fly it for me as he is a good flyier.He is into airplanes and helicopters (electric ) and i took the spare batterys along for him to look over.He didn't think the center two wires being reversed would make any difference but suggested to make sure it might be a good idea to post that question here.

I bought the batterys from hong kong so they won't be going back (may get traded with someone if they tend to be to heavy for the model ) I need to weigh them to see what the actual weight difference is......they are for sure more weight.We need to try one in the model to see how it handles it if when in the model the balance is right.It would have not been a good day today for this test as it was kind of windy,and the battery connectors need to be changed to match the one in the plane.we were a little pressed for time also today so this will be something i'll disscuss with him at another time.

May well be i'll need to stick with the size that came with the airplane kit.

BIGMIG