As far as i'm aware they usually turned the locos at Killybegs the third turntable would certainly be up to it being a Class 5 set of frames the Letterkenny line ran bunker first to Strabane in latter years as Letterkennys turntable was getting a bit frail.The Londonderry line as ran bunker first after 1937 as the the turntable from there was transferred to Rossnowlagh for the railcars.Andy.