Avro Lancaster stringers: info, please

Does anyone have any data on these stringers?
Ideally, I would like a detailed and dimensioned cross-section.

Here is a pic of current progress. One of the problems with this sort of work is that all the time drawing ability improves and better sources become available. So much of this work has been re-done, even several times.
The stringers shown here are dummies used to sort out drawing problems.
Mike