I may be using this thing wrong! Ha! This would no be unusual for me.
I didn't buy a spring and had no idea you could change the settings! It took me all my time to work out I had it the right way round! Should I have bought a spring with it? My back is notably worse since fitting it. I must be have done something wrong!
Thanks everyone! I have altered the setting and was better this morning - I think I wasn't heavy enough for the setting it was on. I am going to alter it a bit more for journey home and think it will make a difference again.