The Upper Hull will be ready for a coat of paint, after the MG is fitted and the Turret too. The MG 3-part arrangement is bonded with 'Rubber Cement'; a product that has an enduring mystery attached to it on many model forums ('Fora-- for public squares..). In the event, I used 'Elmer's' rubber cement to bond the bits. It's a contact adhesive (apply, leave to dry for a few mins, and then press parts to be bonded together). It emerges though, from a query I posted on a thread here, that Tamiya may actually intend the employment of something like this (a CA super glue):

- Tamiya product for 'rubber cement' components
It's used in this location and elsewhere on the model indicated by the symbol of a blue tube sporting a letter 'G'. Tamiya are quite specific in stipulating its use instead of other cements; but they don't ever explain why. I'm guessing it's for parts that may need to be replaced, or moved, in future:

- Parts of MG rewiring 'rubber cement'
I actually lost the piece of fibre optic cable supplied with the model; the bit that goes down the barrel. Luckily, I'd bought 2 metres of 1mm finer optic cable for my Cromwell project, and I cut a piece of to fit the barrel
Here's what it all looks like when fixed together with Elmer's:

- MG glued together
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.