Has anybody converted the returnless B6 1.8T to a return style using the B6 3.0 components?
Maybe even runs big Walbro 455 on it?

Or links to DIY modification?

From what I know, running a B5 fuel rail and just extending the B6 return line (from the filter to the tank) to the rail results in reduced tank volume (one half of the tank not working properly).

But looking for the easiest WORKING solution (that does not sacrifice usable tank volume).