[Conor]

Heres the little calculator, still very much a prototype, but feel free to have a play a suggest improvements or point out bugs.

Please check any calculations before you rely on them.....it's an untested prototype afterall.

(you may not be able to run it if your windows updates are not up to date)

I'm having a look at ddplan, not sure if I'll be able to do it but will let you know

Cheers

Conor