Better yet, I found the
webpage where the idea came from. Somewhere I have a dimensioned drawing of it on my computer, I just haven't found it yet.
When you try it out for the first time, ensure that the hydraulic cylinder reaches the end of its stroke before the rockshaft hits the frame, or you'll bend the frame. If it lifts too far, the long, sloped side of the piece may need to be ground down more so it won't lift as far.