Reference to the Vac Advance hose:
Ok, interesting enough... I discovered something else. Mine actually has 4 ribs in total. 3 ribs together, then a white stripe 90 degrees away, then 1 more rib at another 90 degrees.
The first pic shows the 3 ribs and the white stripe to the right.. (2nd pic) shows the bottom of the hose which has 1 rib. Could this still be original ?