The selector slide (side trip lever for switching between front/rear shutter on the Pacemaker Speed) isn't moving. The manual says to push in and slide up or down. Mine is stuck. Is this easy to fix? (I just got my camera yesterday.)

Easy to get into....unscrew the screws on the side rotate cover plate to match the slots by the shutter winding kety and that plate will slide right off over the shutter winding key and then you should be able to have a closer look. If you need to go further that is a little stickier to dig into but yet still very simple. Just think "window shade" and you will understand the whole principle.