Channel Ballance non-tilt window 1/2" channel width

A handy person from Littleton, Colorado says:
Based upon the detailed measurements on your website I think I need a 29" channel balance (stamped 2840) with the 19-009 (7/16"x1/2"Acorn Top) and a 15-004 (15/16"x1 3/32"Winged Shoe) and the 18-041 (Acorn Sash Guide).
My questions are:
1. Assuming my measurements are correct, do you agree with my conclusions above.
2. Can you tell me what series of channel balance I need. I'm hoping the pictures will help you determine which one I need.
3. Do I need to order the parts separately and assemble them myself or do you offer a service where you would assemble them for me?
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Hello! See our S710-29 side load channel balance. I would also recommend the 2840 option, of course. This looks like a good match. This balance comes fully assembled and ready to install out of the box.
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