I just finished putting together an ice tube clock given to me as a gift. The kit is great, but I have an issue withe the acrylic case.
The side panel which has the hole to support the end of the tube is too short. As such, there is no hole in the top of the piece to accept the nylon screw. Please see the attaches images illustrating the height difference between the two sides. (I can try to take more, if needed.)