Epic stuff mate! Although you lost your bearings you had prepared well and could spend the night comfortably till daylight came - what a surprise if you woke up in Tescos Car Park
Glad your ok mate.
I did this round of 5 Dec 5th and heading to Munro number 2 i followed my compass, although my SOD was telling me otherwise...I could see a top 1k away and decided to head for it. Got there and turned on my GPS for it to tell me i overshot the 2nd Munro by 1k and 50m East from where i should have been. Turns out my compass had a bubble and was throwing me in the wrong direction. My instict (SOD) was correct. We, our group, continued using a combo of GPS and broken compasses as i felt safe on the plateau and being pointed in the correct direction.
My point is that its so easy to be thrown off course with SOD and compass (if broken - or read incorrectly as in Graeme Dewars TR). Mistakes will be made no matter what and as you and Graeme proved its how prepared we are and what we do in these circumstances that can be the difference of life and death.
Thanks for posting and informing others of the dangers that can arise.