Question for VPI record cleaning machine owners.

 Actually, two questions:
1. How long (roughly) does the pick-up tube brush last?
2.  Is the Delrin model worth twice the $ of the standard one?
    Thank you in advance for your help

Depends on how often you use it. You can change just the felt strips. Mine was good for 4 years before I even looked at it, and went to the Delrin (after trying the walker, which scratched a favorite record...). It is worth it; so is the big knob.