Hi Tony,
Panther tracks have a fair amount of sag, so if your tracks fit so tightly that they pull off road wheels and idlers, they may be too short.
When a track breaks and hot welding or gluing is no longer an option, you can often use a couple staples to keep them together. In most cases, you can hide the staples under a road wheel, skirt, sprocket, or some strategically placed mud. Sewing them together with string accomplishes the same thing.
Sometimes you can release tension on a track by adjusting an idler wheel axle. This will not help if the track is simply too short.
Sometimes you can graft a few extra links to a short run using glue, staples, or string.
Good luck with your project.
-Doug