The colourful, wonderful spectacle that is the An Post RÁS will glance in a brief courtship with Castleisland today at about 12.10pm or so. On its hurried way between Charleville and Caherciveen the riders will head down the N21 Bypass and through the Dooneen, Knocknagore and Sandville roundabouts and thereby giving spectators ample viewing space between…