Good to hear on the Continental, I might give them a try at some point.
Right, TPU.. I got that mixed up with latex. I have heard that the Schwalbe One tires are themselves prone to flats since they are thin so that plus the impossible tube could be a major disaster. I guess I could just view the tubes as disposables, but that is an expensive waste.
I looked up the Greenspeed Scorcher, the lightest version is 320g which is more than all the other tires I mentioned by 50g or more.
I might just try the Schwalbe Ones tubeless as Plan A, one thing I found from past experience is many tires will work tubeless if you are patient about putting a ton of sealant in and letting them seal up over a period of weeks. Those tires with a regular tube will still be lighter than the Contis or the Marathons which are around 285g, so a regular tube in the Schwalbe Ones could be plan B.