[Gordonjcp]

No PRs at all while you're away. No new code. Not so much as a spelling tweak.

Get them to make a branch each, and work through the whole thing line-by-line, documenting what they think is going on. Ideally, get them to work on each other's code. Given what you've said about their coding style and techniques, there ought to be plenty for them to figure out.

You sound like you're due a cleaning of the stables that'd give Hercules the fear, and you must play the role of Eurystheus.