I know this may seem like a bad idea to most but you say you are wanting to balance it sooner rather then later because of your age, inotherwords, not really looking to start completely over, you might be able to find a neighbor that is wanting to reduce the LMB in his pond that could hook you up with some adult bass, 1lb or better, they will speed up the process of balancing out your GSF, and wont get eaten by them, might be faster and considerably cheaper then buying full size LMB.
Good Luck, let us know how it goes!
