(19 May 2015, 5:22 pm)Dan wrote Crikey... If you are impressed with what Robert has done so far, you'll have a heart attack when you see my completed version which contains a fair few more workings...

Rather than updating it every time a transfer takes place, would it work to update them monthly or bi-monthly? I'm just trying to think of ways which will be easier to do for you since you actually have a life besides the forum.