I did something much less elegant, but it worked well. I have a 12 x 17" Calphalon Baking Tray. I put an empty brood box in this, so that the box was resting across the long edge of the rim. I put the Flow super on top of the empty box. The height was perfect for draining into a 2 quart jar. A second baking tray caught any drips from the rear. A strip of foil over the edge of the two trays made a sort of seam to divert the honey into the trays. The nice thing was that the tray tilted the super to 5.5 degrees, pretty close to the tilt recommended by Flow.
Here is my simple drip tray system:
It caught 50ml of honey from 6 frames.