Tom C: Balancing this puppy right on the main spar required 15 oz. of weight between the engine and firewall. I did that by melting a bunch of split shot lead fishing weights and pouring it into a pepper can. The resultant bar of lead fit beautifully between the legs of the engine mount, against the firewall behind the engine. I put a pair of blind nuts inside the firewall and bolted the bar of lead to the firewall so it can be easily removed. I had just ordered a couple of sub C NiCads from Interstate Batteries for my glow starters. Meantime, I am going to weigh the old sub C from one of the glow starters and if they are significantly heavier than the AA cells, I will order four more and make a battery pack which will allow me to reduce the lead ingot somewhat. I really dislike the idea of that bar of lead between the engine and the firewall. And EloyM, I am certaninly happy that yours wasn't damaged any more than it was. Sometimes, good things do happen to us in spite of ourselves.