Hi, yes have worked on the 8000X, 8000S, 8500X, 8800X, 9800X and used to work at a Motorola service centre.
The 8000S & X were my speciality and was the first person outside of Motorola UK allowed to repair them.
The UK TACS model 8000X was launched from mid/late '85 onwards and operated in the 900Mhz band with a 45Mhz offset