How often should I have my vintage film camera serviced?

My father gave me his Cannon FT purchased in the late 60's in Vietnam with his first big Army pay check. I learned how to shoot with this camera and although it isn't worth much, it has a lot of sentimental value to me. I don't shoot with it often because I prefer to shoot with my Nikon that I would not be heartbroken over if I broke it.

I took it in for a cleaning to a professional shop about 6 years ago and had to replace the focal pane shutter but was told it was otherwise in working order. Because I don't shoot with it often, how often should I take it in to have it checked out or serviced? I store it in the original leather case it came with. Is there a better way to store it?

Added (1). Typo! Sorry *Focal Plane Shutter*

Probably never.

Unless you start having problems, 35 mm cameras are pretty much bullet proof.

I still have a Nikon F2 that I purchased a few years after returning from Vietnam. It still works just fine