Interior Vacuum Attachment
Dan Erlewine at FRETS.COM
Dan's Interior Vacuum Attachment

It's that same stuff the CNC crowd uses for air and liquid coolant delivery. The sections snap together to form a bendable semi-rigid tubing. Dan has adapted a length of this stuff for his shop vac to clean out remote interior areas:
It may seem trivial at first, but when you use it to suck up a reluctant mess deep inside a guitar, you'll be glad you made one for yourself.
