He changed the unit thing with 2 springs that keeps the gearshift upright, and the selector seal, and another larger seal that i wasn't familiar with. He also threw in a spare selector seal and took a few minutes to explain how i should go about changing it when it starts leaking. If that isn't top customer service then i dont know what is.
We also chatted about oils and he suggested the cheapest 10/40 mineral oil (own brand morrybob) for these boxes, the higher viscosity helps the synchros