hehe, I'm glad you brought that point up NeoStrider. After a little reading it turns out that the mark1 model that I'm doing didnt have the outer fuel tank, just the inner bigger ones so they will be removed and the parts added to the future mark 4 model 
- Mk1, range around 950 miles with 1000lb bombload (2 x 140 gallon inner wing tanks
- Mk4, range around 1450 miles with additional 2 x 94 gallon outer tanks
Apparently with the Mk4 models the additional weight was too great for the plane to land with near full tanks so they had to install an emergency 'dump fuel' option.
Here's a reference picture that better shows the size of the tank area - the big gap between the wheel and central part

Simon