Jeesh. Wait till you get it and shoot it before robotically packing it off for a CLA. The shutter is quartz-timed and probably accurate till it drops over dead. If you consider $160 steep for a competent CLA, then you'd probably freak at the repair bill a cheapo CLA might deliver later. I'm not a big believer in preventative maintenance on cameras, aside from dimbulb DIY stuff like light seal replacement. If it's OK, then shoot your F3P till it breaks.