Yes, the exciting world of hose clamps. I used modern-style spring clamps when starting a fresh engine and had two radiator hose leaks. One on a very smooth aluminum radiator inlet, and one on a rougher thermostat housing. Just not enough clamping force. I fixed both with a couple of junky worm-drive clamps, but I'd like to put on some nicer stainless ones. What do you like?