Old news, that article has been around for years, I have previously written and posted a critique. The main problem is it assumes that your engine is PERFECTLY tuned, ie; your NEW engine is exactly the same spec as your OLD engine. This doesn’t seem to be the case on SAU, the guys here build a new better/bigger/stronger engine with large variations in the components, both internal and external.
So it’s classic Catch 22, the engine needs to be run in vigorously, but you can’t because it hasn’t been tuned PERFECTLY. You can’t tune it PERFECTLY because it hasn’t been run in.
As a result, I stick by my previous running in process, which is hardly gentle.
cheers