Hi!
From whom have you got the impression that different ABC,ABN, Or AAC engines requires different running-in procedures?!!
The are all run in the same, be it OS ,TT, ROSSI, Webra, Nelson, JETT, IR or MB!
Just run them at a fairly rich setting at full throttle opening regulation the speed with the highspeed needle ...without interuption...thats it!! it's so easy! Don't complicate an easy thing like running in an ABC engine.

Regards!
Jan karlsson
Sweden