This seemed like the best place to put this - a tip worth its weight in golds!
Like the zombie I can be at 6 am I managed to leave home on Saturday morning without my sightmarks. After an initial panic I realised I had a printout from Linecutters estimator in my bag, albeit out-of-date. It was good enough to save the day - after sighters I had enough info. to translate the estimations into current settings and I have to say I was well impressed with the accuracy. Each time I change my set-up in anyway in the future I'm going to do an update and put it in my bag - I just know I may need it again!
Many thanks to Linecutter