Evening everyone. I just received a F4S via the auction site, I probably mentioned here recently. It’s very clean, doesn’t look like it’s been used much. The last F4 I got on auction basically had to be rebuilt and looks like it was used as a hammer. There’s one more in the bag with fewer than 100 rolls through it. The two I already had have serial numbers in the 24xxxxx and 25xxxxx range. The most recent one goes back to 21xxxx. Were there any problems common to any particular production runs? I don’t recall hearing about any and have never had a problem with one, just curious. I wonder how many F4 or F4S bodies were made. So far it’s the only one I like as well as the F2. Rick H.