Aston Martin raised eyebrows at the Barcelona race when they hit the track in their upgraded AMR22, the revised car showing a resemblance to the race-winning Red Bull RB18.
Team boss Christian Horner told the media it was "no coincidence" the AMR22 resembled the RB18 given Aston Martin had employed several former Red Bull personnel, including technical director Dan Fallows.
He added that while "what they take in their head, that's fair game, that's their knowledge, what isn't fair and what is totally unacceptable, which we wouldn't accept, is if there has been any transfer of IP at all."
Nothing, though, came of that with chief technical officer Andy Green saying: "The FIA came in and did a thorough investigation, examined all the data leading up in the history of this car, they interviewed all the people involved and concluded this was completely independent development."
Krack, giving select media including PlanetF1.com a tour of the team's new state-of-the-art factory, was asked how frustrating he had found those accusations.
The team boss replied: "Frustration is the wrong word because we anticipated that this could happen. And I think we would have maybe taken it more on board if there was any truth.
"So we did our stuff, we knew this would might come and I think if you look back we were quite relaxed about it.
"And there was no mean war of words from our side. I think it has calmed down in the meantime and then we moved on."
Aston Martin finished the 2022 season seventh in the Constructors' Championship, the team missing out on P6 by a single point.
But with just three double points-hauls on the table, and their best-placed results being a handful of P6s, the team will again try something new next season with the AMR23.
Fallows confirmed the car will look different season, significantly so, at least that's what his children say.
"There is a limit to what we can do with the current rules," he explained.
"I know that new cars always have to pass the test of my children. I put them in front of my children, and if they say they look different than then they look different. They will say if they all look the same dad.
"But within the envelope of the rules that we have, then yes, there are significant differences on 23."