Career engine upgrade strategy

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  • Career engine upgrade strategy

    I've heard horror stories of high servicing costs for the career engine and I'm wondering what triggers this ? The only upgrades I've done so far is max the waggons to the era 1 limit of 7 and the servicing costs are $6250 at 80% which is fine. I've 1400 points available for upgrade and I'm wondering if I should use them for reliability ?