It's a terrible design. Far more cost and complexity and dramatically less safe. Handcycles are great adaptive tech, but anyone with normal leg function should just ride a standard foot pedaled diamond frame or recumbent. I cant stress how awful that design is. Everyone in the video has atrocious posture and position on the bike and would generate far more power from legs alone with a proper fit. The fork offset on that bike looks like what happens when the highschool kid assembles a bike in walmart.