Assuming that I get reasonably (less than 500 ppm water) finished BD in my storage container, I am still concerned about additional water absorption before I put it in my vehicle tank.
Are there any methods to "polish" dry the fuel as I pump it into the vehicle tank? Quick-n-dry etc requires a low flow rate, and it is my understanding that water-block filters really only remove free water, not the miscible 500-1000 ppm. Flow rate for my fueling set-up is about 5 gal/minute.
I'd suggest molecular sieves then, you can run them much like an ion exchange resin in a little column. If you are sure you have 500ppm or less you shouldn't need much. They also absorb methanol, but if you water wash that shouldn't be a problem.