Done! And it works. Not bad for a mechanical non-genius. Photo shows the pulley suspended from the "rail rider," with the hooks hanging limply in place. Since I live alone, I don't have a photo of my device in use. Too bad. But here's the photo of the completed device:

To use it: I rest the chase (form) on the left arm of the press, near the counter you can see in the photo. Using one hand to steady it and the other to place the hooks, I engage the hooks under the edge of the chase, in the open areas of the lockup.
To lift the chase, I hold firmly on to the loop (in the photo, it's looped over the counter) with my right hand, and ease the chase into position with my left. Once the chase rests on its ledge, I release the hooks with one hand and engage the chase clamp. (I made the hand loop a more reasonable size after this photo was taken. No danglies.)
The tricky part is when I release the hooks. They want to drop, making the hand loop zoom to the very top of the pulley. With one hand, I have to get one hook end into the hand loop so that the hook ropes form an upside-down Y engaged by the loop. Once the chase clamp is engaged, I can slide the entire lifter assembly back along the rail so it doesn't interfere with the press.
Inspired by Rachel's description of Duane Scott's chase lifter, this is what I came up with. I'm quite happy with it and expect to use it a lot.





























