CPA had a recent article, which said, in effect, the Part 91 operator is not affected. I take exception with this. Cessna has said, they consider the full inspections to be mandatory. Take your aircraft to a Cessna service center, and they will insist on compliance.
The person who is championing the
http://www.conquestowners.org/ program said they sold $14,000,000 in parts in 1 year. Perhaps it's about safety, but perhaps it isn't. The bottom line is that the owners, both here in the US and overseas will pay the bill.
The 400 series guys were behind the ball. The program was implemented without input from the owners. In this case the Skymaster owners have advance warning, and the opportunity to do something to prevent it from affecting them. Perhaps it is a letter writing campaign to the Jack Pelton. Perhaps other action. What I do know that if there is no action, it will be fait accompli.