Not to make this too much about ego :-) but I am actually quite good at maths, did v. well at school, did engineering degree, etc. so I'm not sure I'm a great e

Not to make this too much about ego :-) but I am actually quite good at maths, did v. well at school, did engineering degree, etc. so I'm not sure I'm a great example, rather I am out of practice and not as comfortable with this stuff now as I once was :-)