I finally found the time to try out the "button" solution and it works quite well. The only problem is that now the rope can be destroyed by water arrows (these are also able to activate buttons). I don't suppose that there is a way to negate that? If there isn't, I will still keep the setup as it is, because at least it works. If I come up with another solution, I will try it, but for now it should suffice.
And another question: How do Slow Matches work? I thought that they would emit a fire stim, when used. However, when I try to use them on an extinguished wall torch, they blink red and nothing happens... Just to be sure, I additionally gave the torch the response "fire: light _SELF" (which it should have anyway, as it can be lit with a fire arrow), but still no luck. Thus, I concluded that the matches have to work in some other way.
Edited by Destined, 28 January 2019 - 02:12 AM.