Dan, here you go, all set up with a 411B for carpet farming.
We sold a good number of the Helix forage wagons. All 3 tiers high, 3 beaters and front cross conveyor. They could be RH or LH discharge depending on where silos and blowers were placed.
The drag chain didn't look like much compared to a spreader apron type like the competition had but I don't recall one ever breaking. Most of them we sold eventually rotted out. They also got replaced by much bigger forage wagons. They didn't hold much of a load.