Ice Cutting Grid Wire

I removed the cutter grid and unplugged the light bulb and wire heating plug ins. I slid the front cover plate off the cutting grid and loosened the screws on the front of the cutter grid and unthreaded the broken, top grid wire, leaving the bottom wire in place as it was in tact.
I then threaded the new wire through the cutting grid frame starting in the center and threading right and then left. While the threading was not difficult, the wire was easily kinked. The process up to this point was only 15 minutes or so.

Once it was completely threaded, I worked for a couple of hours trying to smooth and straighten the wire so that is was somewhat taut and straight enough to create symetrical ice cubes.
My frustration came in pulling on the wire from the center point to each outside ending point where it was to be wrapped around the screw and the screw tightened back down. The wire was fragile enough that it would break, by the time I was finished I barely had enough wire left to touch the screw let alone hook around the screw.
After 3 or four days of successful opperation, the grid quit cutting again. As I took it apart, it was obvious that the weight of the ice was enough to pull the wire, that was already too short, away from the screw. I refastened it again, but think it is unlikely to hold.
If it won't hold, I would be hard pressed to purchase another wire. I may bite the bullet and purchase the entire grid mechanism with the wires already installed. Even though the cost of the entire grid mechanism is $200 more than the purchase of another wire, it may well be worth the ease of installation!

remove tray from icemaker by removing 2 screws and disconnecting 2 electrical connectiona. Remove broken wire and restring new wire. Reinstall tray.

First I removed the cutter grid assembly by removing two screws. Also disconnect the wire that powers the grid. Once on the bench, simply remove the broken cutter wire. String in the new wire, starting at one end and working back and forth to the other end. Tighten the terminal screw on the first end, and then "strum" the wires, one at a times, pulling the wires taught. Pull the excess wire thru the second terminal, until all wires are taught, with equal tension. Tighten the second terminal screw, and cut off excess wire at both ends. Re-assemble cutter grid into Ice Maker.
Problem solved!

removed broken wire, replaced with new wire and screwed the 6 tensions screws to tighten the grid wire.

Removed the grid.
removed the existing top to bottom wire.
restrung the grid with the new wire.
Then, it cut ice just fine-better than new.
Note:
wire provided is only sufficient to rewire side to side or top to bottom, not both. If you need to do both, you'll need 2. Yes, lots of money for a few feet of wire.