OOps! of course i should have said earlier LAST year!

Verzeihung!
Thanks for the kind comments.
Earlier this year i launched into building a Samurai style castle keep
it's only the 3rd of January!
looks very impressive...
dunno if you seen one in the flesh, but the stone at the base was very precisely laid and smooth on the ones I've seen... can't make it too easy for the ninjas 
Yes, you are right of course, the pics in the Osprey definately show a smoother join with massive cornerstones at the base.
The other pics show huge climbing assaults without ladders!

So i guess there must have been a few hand holds?