Well, that could be a solution but I think the /leftypol/ mod team is not too keen on cluttering the board with pinned threads. Maybe Comatoast could chime in and tell us how they made it work over at 7chan?
Personally, I would be in favor of temporally renaming this board with the trial board's name e.g. /tech/ - Roulette (or Trial Board)
instead of /roulette/ - Tech
Anyways, my main point is that the current trial board should be clearly advertised to be given a fair chance, however it is done.