Pivot shoes

Hello.

This is a double sash (is hung to proper term) tilt window. The first problem is the back or upper sash would not stay up.

Anyway, in trying to look at it, I heard a snap and found that the spiral balance was not hooked up. I assume that was the snap I heard.

So, after finally getting the tilt window out (these big suckers are heavy) I was able to see all the parts. I want to replace both shoes and balances on the upper sash. The bottom is working fine for now.

I have attached several pictures of the shoes. The balance is 34" x 5/8" and the color is orange or red.

I was trying to figure out how to replace the shoes and saw that there was no way to get them out. So looking at Youtube videos, I saw that you can cut slots to remove and install the shoe. My window is Aluminum, so I'm assuming the idea is a the same, cut a slot. I'll use a Dremel tool, files, whatever.

A question I have is where to put the slot. At the top, or some other location. I realize you want to put it somewhere where it can be hidden with something. And do I only need to trim one side or the other until the shoe can be slipped out.

So, tell me what you can. Also, I need a parts lists so I can set up the order.

Thanks
Bob