Thanks for posting. Length is determined by the tube. If your tube is 34-3/4", I would go up to 35". I would also confirm what the diameter of your tube is. It looks like it might be 5/8", in which case I'd recommend our S600-35.
I'm not sure I understand your second question. Can you clarify?
As far as the second question goes, I have three adjacent windows within the same frame. The right side balance of the left window is screwed back to back to the left side balance of the middle window and so on. Therefore, when you remove the old balances of one window, you would end up removing at least one balance from the adjacent window. My question is can I retension the balance from the adjacent window by itself or do I have to retension all of the balances?
Thanks for clarifying. The tension of one balance would not affect the tension of the other balance, regardless of how they're installed. You would need to adjust the tension for each new balance installed.
