I mentioned that as an alternative to Tallak’s idea. Your idea would help I hope in keeping the tension more constant and in being able to choose different heights.
I would still like to find a way to automatically change the tether length from very short to fully extended. If I have that, automatic launch and landing might become possible. On that, I’m thinking increasing the wrappings around the pulley on the ground might work. If that doesn’t work, I was considering something like locking the ground station pulley and winding the loop on a secondary drum, but then production stops the moment the ground station pulley is locked.
For me, these questions are still far into the future.