A Wizard Ruin? - Piteadie Castle

This afternoon I finally managed to get the low light I wanted on this ruined building. I think it was worth the wait, even though I've massaged it a little since taking it.

I have had a look on Google to find what it is called, but although I found a virtually identical image but no identification (it even gave inaccurate LatLng coordinates)
The ruin is actually located at 56.089160, -3.195000
It is not Balwearie Castle (home of the Wizard I blipped on the 29th Nov.) That castle is on the other side of the B9157

[EDIT on following day]
I found a very useful Castles site that describes Piteadie Castle and if you want to know more, it is CastleUK.net