congratulations mate....only ever one first solo and dare say u'll remember it for years to come! A hell of a lot more solo flying ahead of ya....so just enjoy every minute of it.
Are you being serious when you say you only did 40 minutes practise in the circuits before you were let solo?? If so, i think your instructor is playing with death and if he lets all his students loose after 40 mins...it'll just be a matter of time before an accident happens!
Sorry, just had to throw that in.....it aint your fault. how many hours did you do before you solo??
Well done again mate,
Mark.