its hard to tell with just a foto but ithink the struts could b replaced with them birds mouthed on to perlin ,make sure from low bearin wall then some collars bolted fom underneath each side of perlins
natural slates are better then man mades(eternit)
when stripping a roof you get quite alot of broken slates and the roofer would have to get more out of his own pocket .costing about£1 each one .although there old with new felt battens lead your roof would be top notch .i would put new ridge...
which do u prefer tiles /plain or 49s .or slates natural or man mades
to me my favorite roof is farmhouse red plain tiles what do you think?
which colors and which color ridge to go with them?