[Perfectlap]

A serviceable bearing should be replaced sooner than later. Good engine design can never accommodate using a sealed bearing where it can be easily prone to failure if proper oil and its duration are not perfectly maintained. This is a question mark with too many multiple owner Porsches. Especially if they followed the factory's dubious recommendations.

Personally, if I'm not the first owner or do not have all of the service records then I'm not waiting until the clutch wears out to replace the IMSB. I'm going to bump up that job because saving a few hundred dollars to max out clutch life is not worth guesstimating that the engine was looked after correctly. And since the IMSB/clutch job has utility -- you get a new clutch that can outlast the typical ownership period, I personally would want to put most of my miles on a new clutch replaced at my expense rather than gifting that to the next owner.