So I am in the process of installing new slides. I fed the new slide in and seated it on the skid. Once it was seated, I used a mallett to knock it forward. In doing so, the slide did not stay seated on the rail and ended up tearing. 
I pulled it off and tried to reinstall it but it keeps following the cut in the hyfax. Should I cut a section of the plastic off so that it can be pushed past the damaged area or am I SOL?
I pulled it off and tried to reinstall it but it keeps following the cut in the hyfax. Should I cut a section of the plastic off so that it can be pushed past the damaged area or am I SOL?can you post a pic,to see how bad it got cut, did you put them on dry, i always found it easier to use liquid dish soap to help them slide on
before you drive them on, you should spray the rails with lube, then back from the front about two or three inches, heat up the slide with a heat gun or torch. this lets it flex around the rail but allows the front to be hard so it will hold on the rail.
you can usually spin them around and re-drill a hole, drive them on backward. make sure they are tapered below the level of your rail tip. Also, always remove your rail tips if you haven't done so already. pump some silicone in them and rivet them back on. This way they wont rattle loose and fall off, sometimes stabbing the track.
also, either use new screws from yamaha or a dab of locktight. remeber when removing the bolts, heat the rail in that area before loosening.
you can usually spin them around and re-drill a hole, drive them on backward. make sure they are tapered below the level of your rail tip. Also, always remove your rail tips if you haven't done so already. pump some silicone in them and rivet them back on. This way they wont rattle loose and fall off, sometimes stabbing the track.
also, either use new screws from yamaha or a dab of locktight. remeber when removing the bolts, heat the rail in that area before loosening.
I had them lubed with silicone. I will snap a pic or 2...
Same thing happened to me yesterday. The starting edge of the aluminum is sharp so it can easily gouge into the softer hyfax. Get a small file and round off the edge of the aluminum on the very back where the point is. File up throught one of the holes in the track. Use a sharp razor blade to cut off the dmaged section of plastic on the hyfax, then make a 45-60 degree angle cut on the top of the hyfax rail. This cut will help guide the hyfax back on the aluminum rail. My track window wasn't aligned perfectly with the hyfax, so prying the traxk over a hair helped a lot when reinstalling the damaged hyfax.
If the damage is on the front or the bend area, I would be sure to turn them around and get the towards the back. Unless they are really damaged you should be fine.