Where is your COG on these boats? They look great by the way. I have a 3s 1000mAh battery all the way to the rear under the top deck now on one side. On the other side I have a large bolt (about 4" x 1/2") to balance right to left as well as to keep the COG 30% from the rear. Today I was running it and a crash relocated the bolt and the boat handling changed quite a bit.If I put my battery where your's is located the COG would be very much more forward.