I was looking around for something to carry a puncture repair kit, CO2 bottles, disc lock, torch etc. Tool tubes are cheap enough but are not a big as I feel I need.
I fixed a length of 110mm drain pipe in place of the right hand side case rail drilling bolt holes and using the rail fixings to hold the pipe in place. I glued a pipe connector on each end fixed a blanking plug/cap as a base plate to the forward end of the tube. I used another blanking cap / plug as an entry/exit. To relieve air pressure when fitting and releasing the opening cap I drilled a small hole in one of the blanking plugs/caps utilising a rear carrier plate rubber plug (Givi) as a removable bung.
I may fit one of these on the left sideand use it as a holder for "Big Pie" electrickery and PD oiler etc
And yes this should have been posted in the "What have you done with your bike" section. Doh!