Indexing gears, internal cables.
So had my new bike for a month now, had some trouble with certain gears slipping this morining, so guess a bit of adjustments needed, usually no problem on the mtb usually just follow the park tools guide (slacken off the cables and pull the cables by hand on the downtube whilst adjusting limit screws). At the moment ill probably get away with just playing with the barrel adjusters. But no doubt in the future a full gear service will be required, so any tips on adjusting internally routed gear systems, 105 btw. Probably a daft question like, but oh well.