Glad to hear you approve @zzdhalla‌ :-D

Who should I be running it past?

I haven't got a tacho fitted @A_Volvo_Driver‌ but I doesn't sound like it is going so high in 4th so perhaps it no longer has the 4.56 in it. I will dig a tacho up at some point and confirm.
egads;45904 wroteGlad to hear you approve @zzdhalla‌ :-D

Who should I be running it past?

I haven't got a tacho fitted @A_Volvo_Driver‌ but I doesn't sound like it is going so high in 4th so perhaps it no longer has the 4.56 in it. I will dig a tacho up at some point and confirm.
Ian Stewart