I hope you're all enjoying this as much as I am. I expected a let-down after Android's masterpiece - a Sabre slog or, God help us, a Playfair - but this is a real treat. Skylark's puzzles get better and better!
Thanks, tatters and malone.
My printer has been playing up for a few weeks, so the title of this puzzle is very apposite!
(About half the grid filled so far.)