I assume lots of people here are on Grivel crampons - how does their new flexy yellow/orange bubble anti-bott work? It is light and looks effective, but I haven't been able to find a pair to try out myself.

Excellent.

Didn't know they had a new version.

The "old" anti bott plates, (plastic), have always worked superbly for me. Never, ever had a problem with them. Used with Grivel 12 point crampons.

Just been on the Grivel web site, and the only new thing I can immediately find is this black component:-

Accordeon - Art. RB102
The “missing link” in Grivel’s antibott system: a housing for the regulation bar that joins the crampon’s two parts together. Today’s best anti-balling up system is now perfected with the Accordeon fitted to all sizes and folds up for storage.