regarding your suggestion 2. a:
This is my original link:
https://korpling.german.hu-berlin.de/ibexexps/Mogli/clickmh/experiment.html
and this is how you have suggested it:
https://korpling.german.hu-berlin.de/ibexexps/Mogli/clickmh/server.py?withsquare=8.html
Right? (8 for 8 participants and 8 lists, so every participant gets another list)