Hi Mark
The cannon fairing x-sections are on the drawings below, along with the wing pylon locations, rocket launchers and tanks.
If the plastic kit is anything to go by your Hawk will look fab in the Indonesian scheme and I'm sure that your wife will agree when she sees it.
As an added bonus for you

here's a pic of me after one of the many back-seat rides I had in Hawks when I was ground engineer officer at Chivenor back in 1993/94.
So you can understand why I'm a big fan of the Hawk. It'll be very satisfying to get one back in the air at Chivenor, which is where we still fly our models.
Hey Geoff. At 1/5.5, that's the same scale as the old John Carpenter Hawk which Pim Smith flies, so it probably is just the size I want.
Cheers
Gordon