The gearboxes arrived from Forgebear (many thanks Dave and Julie - geat service as always ). I had to do some minor surgery to get them to fit but it looks like they will work.
Now to complete installation and do a test.
Finished printing the turret roof
Just need to print the top hatches
The level steps are quite obvious as I have printed large steps (0.2mm) to get this done quickly. It should be printed in 0.08mm layers to get a good surface but i'm prototyping and it would take too long, so have to rely on Mr Surfacer or other filler. It will look better with the applique sides on.