Instead of breaking your back with those tongs trying to pull those ties out from underneath the rails, how come they don't come up with some sort of gimmic to hook on to the bucket of that little tractor and just drag 'em out?.... & use the same method for sliding the new ones back in. Let the machine do the work. Seems like a no brainer to me. If you use jacks to lift up the rails on both sides so that you can slide the new tie out/in, wouldn't you be loosening all the other spikes in that immediate area?