I added some locking detail and handles to the inside of the roof hatches.
Bit of styrene, brass and paper clip folding !
Pencil to make the scrape tracks of the locking detents & once weathered should be ok
Also using a pencil ( with a F;n Peyencil) I added the shiny area that the barrel recoil made(possibly a bit much) and where the armoured cover on the gunners sight slewed.
She's good enough for this kid.