If I may add my tuppence worth having caught dozens of the buggers. 4 - 6ft of 250lb mono to a swivel then a simple running ledger. 10 or 12/0 and forget the stupid baits the size of a 50lb tope you see on forums, mackeral flapper works just fine or a flapper of a spotty dog. Crimp the mono. The stupid big baits do nothing but attract vermin.
Not a lot of mark around Oban, most shore marks are in the Sound. Don`t forget to take a bag of potato, if you don`t catch a skate, attach the bag, throw in and wind back, very little difference to hauling in a skate.