Following the discussions on Friday, I placed 2 new anchors in Rhiwbach today. One midway along the traverse on floor 1 around the deep pool, so if you feel the fixed traverse rope is too slack for your group you could clip a krab to the anchor and raise it.
Another anchor has been placed on the left (as you’re looking up) of the waterfall climb not far above the initial steep section, so you can create a belay (using one of the anchors midway up the manway as well) in the middle (or wherever you choose) of the climb, if you choose to belay groups up the short steep section.
Gethin