I am trying to get a Vax-11/750 machine up and running. It looks like the TU58 drive is suffering from the 'gooey roller syndrome'. I see that people have successfully used 1/2 inch (ID) Tygon tubing to replace the goo. Is there any specific type of Tygon tubing (eg. R3603, R2000, etc.) that is used? Thanks! --barrym