I also wouldn't go for any extra gadgets - just make more work, more to learn, more drop on the floor of the aircraft (and jam the control runs and kill everyone), more scope for error.
Don't forget the gross error check after turning onto a new heading - does it make sense, and does it all look right?
There was a post here within living memory of an airline first officer who'd done all the calculations for a flight from Oz to somewhere civilised, but didn't think about what the numbers he'd calculated actually meant, and was about to head off on the calculated heading when the captain asked him to think about it in relation to the map, and then to say whether he really thought that heading in the direction of the south pole, however carefully calculated, would actually get them to Singapore?