For those of you who repair your own cameras, is it something that can be learned? I'm fairly mechanically inclined with most things, but I've never attempted to fix a camera. Would it be a completely ridiculous for me to purchase two 'for parts' Nikon FM's and tinker with them? If I take them apart and can't get them back together, I will have lost $25. But then again, a $25 for a few hours of entertainment is cheaper than going to the movies.