[MrForbes]

7.2.1 Definitions

HANGING: A GAME PIECE is considered HANGING if it's weight is fully supported by a SPIDER LEG and it has been released by the POSSESSING ROBOT. A GAME PIECE is not considered HANGING if it is supported by the SPIDER FOOT


so the rules don't explicitly state that it can't touch the stinger, but they do explicitly state that all of the weight of the tube must be supported by the spider leg, nothing else.

I suggest you watch the kickoff video for more information on the subject....or watch the Q&A.