melt freeze crust Russian Roulette

We sledded around lots of different aspects and elevations playing Russian Roulette today in the 110cm snow depth between 2000-2300m. The melt freeze crust was about 7cm thick at 2000m and 3cm thick at 2230m. It posed as a sneaky ski grabber which resulted in a couple endo's and ski bushing replacements. Didn't see any signs of instability while out hooning but did see some old debris from the melt freeze cycle on a very steep slope. Dug a pitty at 2230m on a W-SW aspect. 30cm of new storm snow is bonding very nicely to the Dec 6 melt freeze crust (which is about 3cm thick at this elevation). Getting hard results on the Dec 1 surface hoar layer with a sudden collapse down 60cm. Bottom 20cm are unconsolidated facets.