The reverse hyper has the same or similar drawback as any free weight exercise, correct? With uneven distribution of resistance throughout the movement. It’s been awhile since I used one but that’s how I remember it, lightest at bottom, getting harder at middle, then starting to get lighter at top. I’m thinking of building my own reverse hyper, but attach the lever to a weight stack via a belt drive through a nautilus style cam. It should create an even resistance throughout the range of motion provided a properly shaped cam was used. Having full resistance from the start of movement to the end.