I just finished a GP Big Stik 60 ARF and put it on the balance machine. It looks like I am going to have to add nearly 8 ounces of weight to the tail. It is extremely nose heavy. There is not enough room to move the Rx and battery enough to make a difference. This seems like a lot of weight to add. Is this normal? Is this going to make it hard to fly (too heavy)? The engine is an Evolution 61 two stroke. Thanks.