I have quite a few old traces in my Garmin from leaving it sitting on the dash as I do my normal business around the county, so I'm making a start on filling in the gaps in Mayo.
So far I have Westport's main streets, the N5 from Westport to Castlebar, a couple of the streets in Castlebar including the relief road, and several of the regional roads around Castlebar.
Coming up: more detail in Castlebar and Westport, roads to Ballina, and the N5 to Charlestown. Next week I should be able to complete the N5 to Longford.