Aluminum single hung non-tilting spiral balance tube

A home owner from Austin, TX says:
Can you tell me how to remove the spiral balances in this window? It is easy to see how to detach the top of the spiral balance. (see picture of top spiral balance connection) But there are no "screwed on" brackets at the bottom of the window which hold the bottom of the spiral balance. (see picture of the bottom of the window, with the weather stripping moved aside)
many thanks in advance for your help with this. I would also like to know that tools and parts to buy. The tube is 3/8" though length and color are unknown until I get the spiral balance removed.
User submitted photos of window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Sure! Looks like you have a builder's grade window, which unfortunately means the sash won't be removable. However, we do have a possible solution.

With someone helping you, you will need to drop the new balance in from the top of the sash, screw it in at the top, then let the spiral drop down. You will then raise the sash and, while someone holds the sash in the open position, spin the spiral up to the bottom of the sash. Finally, with our 75-004 tool, give the balance about three turns to charge it and lock it to the end into the sash clip.

As for the balance hardware itself, it would depend on a few details. What is the diameter of the outer tube? If it's 3/8", consider our Series 400 spiral balance. As for the clip, see our 17-010. It's hard to make it out in your second picture, but I'd wager this is a match. Let me know what you think!
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