1. Hardtail, 9sp 36/12-36, old SLX non-clutch, top-guide.
Generally OK, but from time to time it flicks out off the bottom of the chainring and jams in the top-guide when you pedal, rather than going back on. This is a total ball ache. The general cause is slight back pedalling while hitting some rough ground at speed. I reckon an outer bash may help; a quarter bash would fit along with the top-guide.
2. 6″ FS, 10sp 32tt/11-42, new SLX clutch mech, quarter bash
Brilliant. Even hammering down rocky/cobbled Spanish mountain trails there were no drops. A couple of caveats: a mate runs his without a bash at all and also had no problems. I ran mine forgetting to turn on the clutch, with no problems. My conclusion is that a tt chainring really works for retaining the chain.
Toptip – shorten your chain!