I forgot a very important point. The 4-inch OD tube that the rollers ride on, is $90 to replace. At least the model we have.
The RolaChem is $8 and I replace it once a year.
If you are only adding 30 oz a day that is 887 mL, there are 1440 minutes in a day, the BRS 2 part puts out 1.1 mL per...