[mikefocke]

Show me any engine with 118k miles on it or even 118km that doesn't have the potential for some form of failure. I've had to replace 2 engines and 2 transmissions in the last 20 years, none of them Porsche.

Are the cumulative risks of some other form of failure greater than the probability of an IMS failure? Probably

Are there risks in having a first time installer doing a IMS install? Yes.

Are there risks with any kit you might use despite all the hype behind it? Yes. Some more than others.

Are there tools you need to do the job that aren't in your toolkit and which aren't cheap? Yes.

Could you do it? Yes.

Do you know anyone with the tools and experience?

After all, you are considering doing this to reduce risk, not increase it.