This seems like sound advice, reset2. I mostly make my DIY diesel fuel out of WVO, but much the same way you make your WMO diesel fuel, except I find I only need to settle WVO-gasoline bends for about 1-2 weeks. I am still making fuel in the 5 gallon buckets it comes in after 7 years.
I have experimented with WMO for almost the whole 7 years. About 4 years ago I did a number of experiments to see how long WMO-gasoline blends need to settle for. I found 1-2 months, as you have, was about right. I recently inspected a WMO-gasoline blend that I left settling for a year after separating it from its sediments after a month. I still found a thin layer of black crud at the bottom, so I think you are right on with your 2 month settling period.
I also found that WMO burns better in my N/A 6.2L diesel engine, if it is also diluted down to below 20%. From reading on a number of diesel forums, it looks like the turbo charged direct injected (DI) diesel engines burn WMO-gasoline blends at 80% with no problems.