It doesn't take 1000miles to run in an engine imo
I ran my engine in on a standard mineral oil for 200/250 miles and even that was too many miles ,
just normal driving , boosting it now and again , obviously not revving the piss outa it , changed oil and then went straight onto the rollers and mapped , that was 5/6 years ago and engine has been perfect
As said everyone has there own ways of doing it ,but some folk take running in an engine to unnecessary extreme's the things they do lol