Got a nice new seat to replace the manky old one on my Long 360DTC. Removed the two front 10mm nuts, but the seat doesn't want to slide to allow me access to the rear nuts. I'm sure the slides are just jammed up with two decades worth of gunk (I haven't moved it in the five years I've had it); any other suggestions before I take the Saw-Zall to it with a carbide blade? I started with a garden hose on concentrated strream then emptied about a half can of PB Blaster in there. Nothing.