Agree with Drxx and others. What initially looked like a rather trivial puzzle turned out to have an ingenious and absorbing endgame. And yes of course I used the net to cheat on the final stage...
One of those Listeners which is not that tough to solve - most of the clues being of normal Times standard with the given tweak, but the end result provides a wow! moment: pure admiration for the construction. Didn't spot the genius of the clues until completing the grid, which is the way it should be.
Excellently constructed Twin, thank you.
Almost fell into the trap early on for row 3,
but followed the message to the bitter end.
Fortunately we’re both science graduates.
Like some others, I’ve not finished but have cracked the theme. Absolutely brilliant! There may be a slight problem in that the endgame is uncheckable, so submitters will have to be very careful to enter everything correctly. This is probably unavoidable, and it doesn’t detract from the merit of the puzzle. Thanks, Twin!
Rad, I am not too sure why you say the endgame is uncheckable? The first unclued entry clearly defines how you can finish the grid in accordance with the second unclued entry.