Zoe - I see you use quite light Elixir strings on your acoustic (.009 first?). I think a slightly heavier set - say .010 rather than .009 - might help you and also give a better tone. Depends on your hands, though! I use .012-.053 Nanowebs. I've noticed in the last month or two that the 3rds and 4ths seem more robust - not breaking - so perhaps they've slightly re-engineered them.