You could possibly add a lot of weight on both sides of the spinning wheel, so the lost weight of the payload would not matter as much.
Or maybe put a weight at the opposite end that moves towards the center as you release the payload, compensating for the lost weight at the other end? (* in terms of angular momentum)
The conclusion of this article (dark mode is bad for your eyes) seems to contradict the article that is used as the main source. In the source (https://www.nngroup.com/articles/dark-mode/) , light mode is described as possibly associated with myopia (nearsightedness).
Or maybe put a weight at the opposite end that moves towards the center as you release the payload, compensating for the lost weight at the other end? (* in terms of angular momentum)