Hrm, let me see if I understood this correctly.
The group enters the room, there’s a part of the string - let’s say next to the door - which nobody notices it, where Battler would be able to attach the key to. Battler then attaches the key to the string and then pulls on part of it to set it up and make it part of the loop.
So far so good, I hope.
My first question would be the part about what would cause the string contraption to start moving and get the key moving through the ceiling. [color=red]Anyone would’ve noticed had any strings been attached to any of the pots or their respective lids. No tripwires or sumsuch were present in the kitchen, either.[/red] The only option then becomes to manually pull on it, but when could’ve Battler done that?
If it’s before Kinzo restrains him, the tug would’ve caused the string to get stuck on the last hook (again, if I understand it correctly), making the key jam and the knot to break - making the key fall down. However - the only pot the key could’ve landed in at that time would’ve been in the one Kinzo opened (since that was the only one open). But that’s not the one the skull key was found in.
Therefore, for the tug to happen, it would’ve needed to be at a point where at least one other pot (the arm pot) was open - when the group had gathered around the pots and started lifting the lids. How would have Battler been able to pull on the string, then, if he was being restrained by Kinzo at the time?