I've been holding onto these tubes for awhile now excited to use them since I found some caches like them out east. I was concerned about the log getting stuck and was trying to problem solve what to do with what I had. So the marbles are swag! but also please leave at least one in there so it could be used to jostle the log forward if needed. Am I losing my marbles? I think so. Who knows...this could be my next series.