Pete's up through the roof of the mouth method resulted in two hook-ups yesterday. Used it on the small ones I didn't want to back hook because was towing them around rather than drifting and nose-hooking the small ones seldom seems to work out well.
I've now settled on

So, small livies (and possibly very big ones with bigger hooks, but haven't trialled that much yet), it's up through the roof. For average sized livies it goes through the nose. Still deciding between roof or the nitta cable ties for the big livies.
But nice to be narrowing things down a bit.
Pic of yesterday's test results: