Hello Henry and thank you for getting back to me.  I have a couple of additional questions:

1. In your reply about burner size you mention to buy a burner that is 320mm x 320mm x 109mm.  I believe the 109mm is the height (and not the size of opening on the bottom of the Kaldi Fortis).  Am I correct?

2. I have an oval burner on my (Samsung) kitchen stove, the outer dimensions of the burner flame (tip of the flame are 260mm x 110mm and cast iron rack on the top us much bigger (450mm front to back and 600mm left to right), sorry I have a picture but cannot attach it here.  I think the 110mm wide flame is OK, do you think the 260mm is acceptable or maybe too big?  (for info the burner rating is ok, 9500Btu). 

3. I also have other round burners from 9,500 to 22,000 Btu but the grate is only 225mm x 235mm for each burner which may be too small.  I would like to hear your opinion on these.

Kind regards,

/Jody