Direct Train to Train Grain Transfer for Break of Gauge at Ukraine Boarder?

Media reports indicate that the transfer of bulk grain by train from the Ukraine is hampered by the break of gauge at the boarder of the EU. Ukraine uses the broad Russian gauge, while Europe uses the narrower standard gauge. So grain has to be transferred from train, to storage and back to another train. But could grain be transferred directly from train to another, under gravity, in a few minutes? To do this an elevated track would be built with Ukrainian gauge. There would be fixed chutes to direct grain down between the tracks to a standard gauge train underneath. The elevated track could be constructed in a few days using a combination of timber, steel, concrete, and earth embankments. No moving parts would be required, or complex control mechanisms. Of course there would be limitations, with compatible trains in place at the same time.