I know this is probably a really dumb question, but what what can count towards the size limit? if you have a motor outside the sizing, does that count against you? how about zipties, or wires? I know, dumb question, but I’d like to know.
Anything that is outside of the 18x18x18 will cause you to be out of spec wether it be a motor or a ziptie they don’t care about what it is it just has to be in size. With a zip tie or a wire you can just fold it to fit but even that will cause you not to be in size.
Remember that even non-functional decorations must not go out of the size limit. It applies to absolutely everything.