Grizz is right,shorten your LSN as he described.I did my gen4 7port and it tunes real easy and stays consistent all day.
I took your advice Grizz and have ordered a Gen5.5 5port and 2072 pipe combo from MM.Luckily I know what I am in for with breakin after breaking in the 7pt (now where`s that heat gun?

Will let you know how it goes.