Put the new otterstat on with the new clip thought you might like to know the rest. Had heard about air bubbles and bleeding and the like so was paying attention to the refill. All I did was start the engine and pour coolant into the overflow reservoir until it was about half full (a little over a gallon), put the cap on and let it run a while. Next day checked and coolant was where I left it in the reservoir. Drove it into town today, no heat problems at all, fans didn't come on (they normally don't unless AC is on), by the gauge it was as cool as ever, in fact seems a tad cooler but that's probably imagination. Otterstat clamp on my VIN (later one) is just a piece of formed wire, a spring type, quite strong. I wrote last about adding a nylon tie, this I did. Robert mentioned the stainless hose clamp, that was my first instinct too but I asked around and per previous the agreed upon clamp was the nylon tie. The hose clamp is probably overkill but no harm in that. No bleeding problems, no problems at all but I have one other thought, there's room for more than one wire clamp if you care to use, If I had it to do over I'd use 2 clamps (still can, of course, and may still do it). There's plenty of room and from a mechanical point of view just a better concept. Then again, how much overkill do you need?