Ken's reworked K04 is designed to work with the stock tune, I understand. If so, then why would we automatically conclude that it would not be compatable with the HT tune? It's not "big turbo"? it does have a little more efficiency and might not hit the choke line as early, but it's still a K04. If the wategate has been opened up a bit, the tune is still going to limit boost and the wastegate would be able to bypass better to prevent or reduce the likelihood of boost creep at the HT tune load limits.
I would not consider advice from AP or AP users as the answer to this question, although I'm sure they all mean well. I'd like to know what PG and HT each have to say. Either way, I would think that anm6 should now be stepping up to Dash Hawk or similarly robust monitoring if he's going to put the upgraded turbo on and start playing with it on eithe the stock tune or the HT flash.