Spiral Balance Shoe

can you help me identify these parts

How do I stall your model 15-017 Spiral Balance Shoe? I'm replacing the spiral balances in a non-tilt aluminum window, and I found the old spiral balance shoes laying on the bottom window sill and in poor condition. Your model 15-017 Spiral Balance Shoe looks like an exact replacement. Do these ju ... (cont.)

Goes on bottom of window, slides on the bottom and connects to the shoe

Hi, this is a bottom boot out of a double hung aluminium window. I have included some scale drawings in millimetres and inches too. The spiral balance hooks in behind the two small triangular extrusions which have broken off on most of the windows so the balances can't be tensioned. Thanks, Stev ... (cont.)

Total window is 36x 36 (2 panes) late building built in 1972. no markings or labels but from previous pics could be ALENCO. need to replace balances, but first need to get sash out to access balance. How do I do that, ie. do I let go top and bottom of balance on both side first to remove ... (cont.)