These are my interpretations of the parts of the Deca 1 kite - I have since acquired a copy of the manual and renamed the spars according to the Guildworks naming.
Labeled Front view of the Deca 1
Labelled Right wing front view
Labelled left wing top view
Notes:
These are the measurements I took of the Deca 1 spars.
* I suspect that this section should also be 73 cm, 6.35 mm carbon fibre
Note: These sizes correct on my (second hand) Deca 1 - tension looks OK, but might vary for other models.