I need to replace my half inch channel balances in several older, aluminum windows. I have attached pics. Taking cues from an earlier post, the foot does seem to be 1&1/16 inches. The top appears to be a 19-002 and the foot appears to be a 15-003. I need the complete assemblies for 29 inch channels for 4 windows and 23 inch channels for 2 windows. The current channels are marked j A2850 for the 29" and j A2240 for the 23" channel. Can you tell which replacement parts will work? Thanks
