I use a separate water heater to heat up my glycerin to get the methanol back via a condenser.
The thermostat is set for 150 degrees which is just 3 degrees higher than the boiling point of methanol. At first I just used a heater core but then went to a copper coil surrounded by a water bath to condense the vapors into a sealed tank.
I know that John Deere did experiments on running 100% ethanol in their equiptment. It worked but they had to use more expensive and robust fuel system components. I went to an renewable energy conference and they were saying that you could run a blend of 10% methanol in biodiesel safely in most systems. I would make sure that all rubber components were replaced with viton or simular alcohol resistent products before doing so. They said the by running the alcohol that you would regain the energy lost(about 10%) by running bio-diesel vs petro diesel and the alcohol acts like an oxidizer and helps the fuel burn even cleaner. the main drawback to using alcohol is that is acts like a cleaner and it will end up plugging your fuel filter several times as it cleans all the gunk out of your system but will subside after it is cleaned out.