correct...in some OS/PCM combinations its just not possible...your's might be one of them. Remember the way hptuners does it uses the excess ram of the pcm to store the tables...right off the bat adding cells as in the 3 bar custom OS takes away part of that excess ram as it is...now try stuffing an EXTRA 3 bar table into the little remaining excess ram...there very well might not be any room left at that point to fit that whole 3 bar table which makes it near pointless at that time.