Hello Joe
I do not have record of a turbine engine sold to korea But if you had an issue with any of the parts which i wish to state come from Wren UK.
The orignal Vap tubes were stainles and the only reason they were changed to innconnel was for the Turbo Prop attachment because of increased combustion chamber temps.
I think sir before you came out publicly and made such statements you would have at the very least been courtious enough to have given JDE a chance to correct any problems you may have.
You have never contacted JDE and any warranty issues should be forward to JDE directly as the point of origin.