After doing some more searching around, I finally came across a post in 2018 from Obsttorte that provides a few more details: http://forums.thedarkmod.com/topic/9082-newbie-darkradiant-questions/?p=418498 (bold added by me) I'm sort of reading between the lines here, but it sounds like the script referenced used to be distributed as part of the base pk4 file...probably on accident more than on purpose. At some point, the script must have been moved into the mission folder and taken out of the base distribution because it was never intended for general mapper consumption. All the same, after reading through the script, it seems like it would take only minimal modification to work for my case. Previous to the post I linked to, there is some discussion about making this a prefab. Now, I fully admit that I'm coming in completely new to this, but it seems like the only thing stopping this from being a prefab is the one line in `tdm_numberwheel_lock.script` that references the much talked about `closeBar`. Just a cursory glance over the rest of script, and the related `tdm_numberwheel.script`, and it seems like the script is localized (i.e., doesn't reference a hardcoded global name). I wasn't terribly thorough, so someone might correct me on that point. But after all this, I'm left debating whether the combination lock actually fits into my storyline, or whether a simpler key-based safe would suffice