After the top of the falls at Aber have been cleared follow the path up stream and cross at a small island, go straight up a grinding flog to get between the Bera. Fairly good trod to safety checkpoint. After that aim for the right hand side of foel grach, missing the summit and aiming a rock outcrop. Countour the side of foel grach to the saddle between it and llwellyn. Over llwellyn and onto the ridge to dafydd. Come back on yourself after this top and decend via a stream to the mountain rescue post. Over the Cribyn is fairly straight foward. The route off the glyders can be tricky so worth a recce. Crib goch is out of bounds so it's up the pyg track.