PD, I think I may have worked this out actually. I've been reading "A Brief History of Time", and have come up with the following:

Variables:
T=Time
L=Location
G=Time variant from G.M.T.
p= practiced poop time
P=Target poop time (the answer)

So, here we go.

P=T*Pi/(L+G)-(p/p*g)
all over;
G&T

I think it will work. Any comments appreciated.

_______
like a constipated accountant- I worked it out with a pencil.