Those look really good. I am REALLY interested in getting your impression of them. I would have thought bolting in a small discreet metal block on the front and back of the grill to support the center. Might have been easier than welding. Then the grate halves could simply be put in the dishwasher.
I kind of did not worry about buying another porcelain cast iron grate set too much. Actually bought 2 sets. One for the Q300 I gave the daughter, and 1 for the grill I traded you for. I figured in both cases these were 10 yo plus grills and still had original grates. And honestly the Uniflasy CI grates were made as well/better than the OEM ones and at $49 the thought process was hell, even if I have to buy a new set every 3 years or so. Who cares? I can eat a $49 set of grates. As they're made to do 2 jobs (heat dispersion and actual food cooking). But the stainless ones REALLY intrigue me. So please cook some damn steaks and chicken and tell me how they did