That is alot of volume for overspeed. Also, what size hill are you using? You really only want a few % gradient or else mechanics begin to get screwed up.
I dont know the exact size but it looks like a veryy slight downhill that would be ideal for overspeed.
Couldnt I just go from resisted to regular sprints on the track with a bit of a tailwind…, hard to deal with this crap on the grass…