Jake Raby designed the IMS retrofit via Flat 6 Innovations, which I think may be part of LN Engineering which sells it now. He is also active on this forum, so perhaps he will reply.
If you reading old IMS threads, I have something for you to keep in mind. Prior to Jake arriving about 5-6 years ago with the IMS retrofit, IMS was an issue that got discussed, but not nearly at the level it is today. His product promoted a lot of discussion about the IMS issue, which created a lot of IMS fear as people learned about the potential of having an IMS engine failure.
Over time this has caused people to not even question whether IMS affects any significant number of 986's. Now everyone just assumes IMS failure is going to happen to them and they need an IMS prevention product.
With the assumption now being that IMS failure will happen to you without one of these products, people forget that prior to these prevention products being introduced there where maybe a dozen IMS failures actually reported on these forums, out of 165k Boxster's. If you go to this
thread only 6 IMS failures where reported on this site after over 40,000 views.
I think the IMS products are great insurance, they buy piece of mind for 986 owners with Single Row bearings. But I wonder if the fear that motivates these purchases is justified. I am sure Jake will disagree with me, but he also played a large part is the publicity the IMS issue has received.
I should add that I am not trying to bash anyone, this is simply my view on the IMS issue with the perspective of having been around before and after the IMS prevention products where introduced a few years ago. Like I said, the IMS products are great insurance and people seem very happy with them.