A really nice shot of this yellowjacket mimic, Allen! Looks like it might be a Spilomyia sp. Good sharpness on your subject and it stands out nicely from the background flowers.
Allen a good record but I have slight reservation over the composition and a slight lack of DOF regarding the head and antennae. I am not convinced the TC was necessary in this case.... WDYT?
(Whilst I think your results are good I would not have thought it good practice to mix and match different brand lenses and TC, as I say the results are good but I would suggest properly/correctly paired lenses would achieve better results )