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I work with a good pair of tweezers under a magnifying glass with good light. Gap filling superglue in tiny amounts works very well. I'd never attempt this in 1/72 scale. 1/48 is kind of pushing it for me too. I've been experimenting with my limits, treading the fine line between enjoyment and insanity. This is only my 3rd build after being out of the hobby for 25 years.
Lovely job CR. I very rarely use aftermarket parts, but I have to say the Quickboost products are extremely good, and excellent value for money. There's no way I could have made the Beaufighter exhausts as good as their resin examples.