I have now acquired some drawings with kind thanks, allowing me to continue..

This next shot gives a better idea of my construction methods.

Next up was the outline of the fuel tank

Following a kind suggestion I have made the bogie end of it concave to allow it to sit more off centre.

Having taken these pictures I decided something was missing at under the buffer beam, it just didn't look right and was obvious the bogies were just cladding. So some more research on the net I hatched a plan.

And to finish off the post.. A video of earlier in the day

http://www.youtube.com/watch?v=b1n4GXk22Z4

Comments welcome

John