I have built a Tiger Moth to a kit produced by Premier Balsa Products Ltd.It has not flown yet and needs to be balanced,Therefore I was interested in the artical on balancing in the MAY issue of RCM&E which gives several answers to the problem,but instruction for my model state that it should be balanced with a FULL TANK I will be peased to know if anyone has built a similar model and how it was balanced.Premier Balsa are no longer trading so I am unable contact them. regards to all JIM