Simple, kind of, quick, not at all! I have the gearbox back together now but it’s taken most of the day. I thought it was possible to get the 3/4 hub off with the main shaft in situ (might be it is with a 3 synchro box?) but it isn’t so I had to take everything apart. Oh well. The other casualty of the trip was the crankshaft oil seal. It was drippy before, but now oil is pouring out. So with the gearbox out I’d better deal with it…