Technique makes all the difference in most everything we do, scrog is a good representation of that. In regards to keeping things flat, with or without a measured tool such as the screen, the difficulty increases with distance from the main stem/center. The greater the distance unsupported, the more structural integrity is needed within the reaching branches. In order to support an increasing load auxin redistribution occurs. Uneven auxin redistribution plays a role in making things more difficult. However, in the case of scrog use to maintain relative horizontal positioning, regardless of relativity to true horizontally level, the tool of the screen maintains the given plane and makes keeping the even plane easy.
So, back to accessibility as the important problem to solve without compromising the intent of horizontal trellising/training.
Over the years it became obvious to me that single plant systems bring a dynamic to cannabis cultivation that is unmatched. What it provides you as the grower, is seemingly priceless. I have been making stand alone single plant scrogs systems that give accessibility you cant get any other way. If you have each plant in a stand alone scrog, that also has wheels, each plant can be removed from a given space, spun, worked, and put back with ease. This changes the game.
I am excited to share my designs, but I am trying to develop a company and product line as something I can support myself with. I havent gotten to the point of reveal, but if you folks have interest in helping with this, please let me know.