Excuse my ignorance, please explain to this long retired 'old fart' what TBS is.
For what it's worth I found that spending 90 minutes as LL/LHR No2 Director, when you might turn 60 or so inbounds onto the ILS LOC', could be absolutely shattering. Having also been a LATCC controller I would say that once you had hacked how to do LL No2 it was easier than TMA, but the concentration required made it a very tiring position.