I received the flange fitting-kit for the fuel sender the other day, and found a few minutes today to get the sender fitted to the tank. I've had a couple of people ask me how a flange with bolts would be fitted and bolted in when there are no bolt holes in the tank. The answer lies in the flange design, which has a notch out of one section and one bolt which is longer than the others. With the long bolt just started in the thread, and the hole in the tank being the exact right size, you can slip the flange into the hole as can be seen in the pics. Once the flange is "in" the other bolts can be started and it's all done up tight with the supplied bolts and rubber washer.