I eventually elected to replace the kit barrel and antenna mount with some RB Models items. The barrel is No 35B102 which looks spot on according to my references, it certainly has much better detail than the kit item. Again I fixed this with some epoxy after making some adjustments to the mantlet. The antenna base also looks much better and this item is No35A14. Both additions although not entirely necessary are not that expensive and enhance the final look of the model.
Well I am nearly at the end of the build and so far it's been a blast. I really like this kit and even without the additions I have made a very nice model can be built.

