People finding these radiators to be flimsy makes me curious, to be sure a thermochill you can about park a truck on without damage but I found quality to be quite good in the fesers and fit/finish first in class. Cooling capability is theoretically almost identical with the feser being slightly smaller, with standard fan spacing, fitting type and pre-threaded holes. I noted a small drop in temps going from TC to feser. Personally I never attempted any abuse test on the fesers but they seemed robust enough to cool a pc for sure and far more robust than a typical heater core.