I am with you . I have been trying to replace my 4 cast iron burners for a year now . I only have 2 working at the moment . I have had my Ironworks grill buddy for 10 years on a pole to my 2 nd floor deck . I replaced the 4 burners 3 years ago after the original burners lasted 7 years . The replacements where not that good . all of them have flaked away . I can not get any response from Top gill , they have gone dark on me . Why , I can not figure out . Poor customer service

Are you turning the tank on very slowly? If not the valve inside will shut or partially shut causing a starvation of gas going to the grill.

I have a Weber Genesis Gold grill and I am madly in love with it. I have had it since last December and I use it almost every day. I got it on sale and it was, I think $550 and worth every cent. It has stainless everything: lid, cabinet, burners, grills, corian-type side work surfaces including two that fold down or up. Plenty of storage underneath. Three cooking zones. Easy to use, easy to clean, works flawlessly. Cannot say enough good things about this grill. Plus parts are readily available and reasonable if it ever needs them. This is a big deal with regard to grill longevity. I would not recommend a side burner. Most of the time they don't have the BTUs to work very well. I had one on my last grill and never used it. I now have a camp stove that I use if I need burners. It has 3 very high BTU burners but even so, I don't use it much either.

I have no clue about our duct work, we vent at 90 degrees to exit house, about 8 feet. Our "quiet" 600 CFM sounds like a locomotive when on high, and our smoke detectors always go off when I cook steaks inside. I have the wolf df range, and I also suggest your hood be at least 6" wider than your cooktop so that it works on your outside burners. Working within the confines of HOA will probably determine your appliance choices. At least you have some existing hood/duct work, rather than a recirculating filter system. Huge plus!