Martin,
I didn't see caps on the tube or hardware in that video.
I'd toss these in the kit to really finish it off.
Cap for HSS tube:
http://www.mcmaster.com/#sundry-plugs/=j8z9zv
Cover for the nut:
http://www.mcmaster.com/#push-on-caps/=j8zd97
and for wire management:
http://www.mcmaster.com/#mountable-c...olders/=j8zfio