I will try to explain what Jim is saying in case you cant watch the video at work, although I highly recommend watching it when you can as it is full of great information. If you remove the button assembly from the tube and take off the top cap you will see the 4 screws. The smaller adjusting screws are reverse
threaded and come out first. Then using a larger flat head screwdriver remove the larger screws while
holding your finger over the button to prevent it from flying off. The button will come out and you will insert the black delrin block, round end, into the switch assembly. This will hold it in place while you tighten the brass ring on the bottom of the switch assembly. Make sure the silver post is in the plastic rod on the back of the button and that the magnets are in place, one on the back of the switch itself and one in the assembly, and reassemble. It sounds difficult but is easy once you have done it a time or 2. I hope this helps, feel free to ask any other questions and let us know how its going, once it is up and running it will be your best friend!
EDIT: Took too long typing, disaster averted, all is well
