Does anyone have a good route between Rhayder and Builth Wells? I want to avoid the A470 as much as possible but NCN8 is a bit too offroad for my bike and I don't want to pile on too many miles. My plan so far is to go A470 Rhayder to Newbridge on Wye, then join either the old A470 to Builth Wells or switch to NCN8 (which is on roads from this point).