In reply to simondgee:
I was on the blunt end on the Old Man of Hoy so I can't remember much about the gear. But the SMC website has some info here to update the section on Hoy in Scottish Rock Climbs
http://www.smc.org.uk/Downloads/Scottish%20Rock%20Comments%20July%202011.pd...
This says
'Two 4 Friends are not useful, as the relevant cracks are slightly narrower or wider than a 4. Those wanting close protection will need to take a 5, but normally two 3.5 Friends is enough. The top wedge, which was often used for aid to reduce the grade to HVS, has gone, so there is no escape from E1.'
To get to Am Buachaille, there is a channel of deep water (about 8 m wide) which you have to swim, even at low tide. On the landward side of the channel there is a tidal rock platform that is about 30 m wide. We arrived 3 hours before low tide and this platform was already dry, so it looks as if you would have at least 6 hours to get across and climb the stack - loads of time even for a rope of three.
Allow plenty of time for the walk-in and approach, as the way down the cliff behind the stack is not obvious - it took us almost 2 hours from the Sandwood Bay car park.
We took the Landward Face route. Pitch grades felt like 4b,4c,4c. The rock is a bit crumbly and does not inspire confidence, but the two 4c sections are well protected. The first pitch was a bit worrying though...
Stoer will feel like a doddle after Hoy and Am Buachaille. Solid rock, good gear and the best climbing of the three.