Again (it was mentioned elsewhere); this post is NOT an attack on ARF or the MCSA, both organisations to which I have volunteered my time on a number of occasions (Im not an MCSA member but have still helped out at work meets), but simply a question about the type of anchor we are installing.]
I feel that ARF are installing the wrong anchors at our sport crags. There is a much better, safer, more sustainable and cheaper(? - not, as it turns out) option:
Think about this - why would you want to undo your primary safety attachment (the ROPE! - of all things) at the highest possible point on a route??? Why open up all those possible avenues for an accident? Why waste time fiddling around to clean anchors - putting yourself at risk of making a mistake, when you could simply clip in and lower immediately, saving loads of time and energy? Not to mention being totally safe.
Abseil anchor

Sport anchor

The biners on these anchors are made from the same steel used in the bull hooks on construction cranes - they are TOUGH! They are specifically designed to handle the wear of top-roping and lowering. The biners are replaceable. The sets are actually R5 cheaper than the abseil rings per unit.
The steel used in the abseil anchor however is soft by comparison and is NOT designed to handle lowering/top-roping. Im told the rings apparently rotate when the rope is pulled through, spreading the wear - unfortunately in reality this does not happen! (Inspect the rings of most routes next time you climb - nice shiny patch in one place only right? = NO rotation). The rings are NOT replaceable.
- lets use the right gear guys!