I'm planning on doing this unit in BR Green circa 1960.

I'm still plodding along with the roof. I spent a long time this afternoon trying to work out how the cables connect to the junction boxes at the end of the roof - some of them turn through 90 degrees and run down the coach end, whereas others go in to the junction boxes. After some head scratching I now think that there are at least two different roof layouts on the "production" 2-Bil units.

2010-2116 seem to be close to all 3 published drawings I have (MRC/Branchlines/King). These have offset torpedo vents.

2117-2152 have an alternative arrangement with the torpedo vents down the centre line.

I was planning to model one of the later units, as these have the self contained buffers. So I'm now going to do 2101 as there a couple of shots of it's roof in Alan Williams' "Southern Electric Album". So I'm off to find some suitable spindle buffers.

I should have done my research more thoroughly before starting. I also placed too much faith in the Branchlines detailing instructions, which have you build a unit with features from different batches.