One more trivial calculation of mine: if they claim that the length of the stringy loop lensing CSL-1 is about 10^14 meters (10^49 Planck lengths) and the tension is 10^-6 squared Planck masses, the total mass is comparable to 10^43 Planck masses which is roughly 10^35 kilograms. So this loop of string would have something like 50,000 solar masses, unless I made an error. That would be a huge chunk of mass.