Thanks Guy, do you remember which hand you took the "pocket" with? Also, amazing effort soloing this - mattress or not, its too high to be a boulder for me!
CC60, that sounds about right, "vertical slab moves" is a great description!
Here's what I kind of managed on a shunt the other day:
Couple of easy moves to big diagonal rail, clip first bolt.
Outrageously hard rockover move from rail to really bad RH crimp (crux).
LF on near LH and hard move up to bad LH. (Still really hard, and LH hold eats skin)
Sort feet, bump RH to slightly better 2 finger crimp (could be described as a very shallow slot, candidate for the "pocket"?).
RF high on slopey foothold, RH up to OK small sidepull. Clip second bolt. (End of the really hard moves)
Paste LF on, long move to LH crimpy depression (possible candidate for pocket?)
Reach R with RH to poor crimp near arete.
LF onto the "slot" from earlier, RF out onto decent slopey foothold, LH in near RH on worse crimp.
Pounce RH to good arete.
Bimble to top.