I was trying to find a link to a website which advocates this essentially.
bed in is in reality very rapid on modern engines' n materials.
a few low load low rpm runs, and cool off period, then med load med rpm runs with cool down between, then high load med rpms, again cool down between then med load high rpm, cool down then high load high rpm, jobs done.
the site I read had evidence to show this short style break in period gave better power also.
will see if I can find the link.