Hi @linuxgurugamer, and thanks for your tremendous work on all of your KSP mods, which happen to be consistently within the best and most reliable.
I am trying to launch your balloons to explore planets with atmosphere, perform kerbalism low/high altitude biome science experiments and serve as zero-cost mobile relays. For this, I am counting on atmospheric wind dynamics to move my balloons all around the planet, in what I expect will be somewhat of a random walk, spanning long periods of time. Thus, I want to deploy my balloons and leave them alone "hanging" at a predetermined stable altitude in what would be akin to a "very low orbit", and to "see" them at the track station whenever they happen to have their batteries replenished by sunlight at their location, but without me having to care about them beyond that. This would be a very elegant, efficient, zero-cost, passive way of exploration and experimentation, which I was hoping to exploit even further by attaching several balloons, means of horizontal propulsion and of descent to one same craft that could effortlessly land, carry out experiments on a biome and then take off again, working as an early-gamish, slow but terrifically cost-efficient quadcopter or VTOL probe. However, I cannot manage to "leave them hanging" in the atmosphere: the game reminds me I can't leave a craft alone mid-flight. Do you know how to achieve what I want or have you thought of a workaround for this? I find the balloons most useful for autonomous experimentation and transmission of measurements from whole planet surfaces, but am not able to implement my idea. To me, this functionality would enormously enhance the playability of the mod and, in my opinion, make balloons a core part of the space experience, as it is in reality with atmospheric balloon probes, early space balloon tech in the fifties-sixties and so. Unmanned passive balloons like the ones I described here are indeed used by space and meteo organisms worldwide to track and monitor atmospheric dynamics.
Thank you again and hope to read your answer, keep up the amazing work.