Take the bolt out of the front of the slider and loosen the track a little. *Line up the slider with a window in the track. *Then you should be able to pull them out with a pair of pliers from the back.
If it ain't broke keep modifying it until it is
Will the new ones fit back in? or will I have to cut the track a bit to get them in? *I've been told that you have to drop the whole skid and take the track off to change them, I'm just trying to avoid that if possible.
The slides don't fit easily through the track windows like on some other brands of sleds. Although, you don't need to remove the track to replace slides. You can simply, just pull the skid out to replace them. It's also a good time to check things over in the skid, like bearings, boggie's, & grease fittings.