As long as you can sit it on top like that you should be cool. the welds look plenty strong.
my problem with a simliar burner was that my new pot was only about 1/2" wider than that ring/lip, so I couldn't sit inside, and couldn't sit on top, it sat half inside/half on, and thus at like a 10 degree angle.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10