I made the 10 egg pound cake. I put it in two tube pans and baked it for a little over an hour. It tested done at that time although it maybe should have cooked another five minutes. The texture is quite heavy. I don't know what I did wrong. My idiot brother opened the oven door while it was baking during the first half hour. Could that have been the cause? I did add a few extra eggs because our eggs are small. Any suggestions?