Hi guys, I would like a bit of advice regarding string gauges. Since I started learning I have been using .009 -.042 guage strings. Just recently even though my guitar is in tune I have noticed it sounded a bit off. Just as an experiment I left my tuner on while using the guitar and when I struck the open B string it was in tune but I noticed as soon as I went down to the next fret on C it was well out. Obviously this occuring on all strings. By releasing the tension on my fretting finger by a fair amount the note C was spot on. I am now wondering if I require thicker strings as I am having difficulty trying not to press too hard. As an ex mechanic I have fairly strong fingers. I know I can experiment with trying thicker guage strings but would welcome suggestions of a good compromise or should I persevere until I adjust my touch. Is this a common problem. I did not realise by pressing too hard the note could sound off.

Cheers JohnC.