Nice rack, I like it.
That said if you came to my shop you will find a bunch of old saws hanging by their rear handle, but they are all non AV mount saws.
It's maybe just me, but I will not hang a AV mount saw by the rear handle and put a constant stress on rubber AV mounts. Especially old saws with hard to find replacment mounts.
Not trying to throw cold water on the rack idea at all, it is a nice compact way to store them, just stating my opinion on what I think about hanging old saws.
I know you were referring to the OP's rack, but thanks as this is certainly something I need to consider. I didn't think of that when I built my shelf. Though the shelf doesn't put any pressure beyond the weight of the tank and handles on the AV mounts since the saw sits on the case, it does stress in a 90* different direction than a horizontal sitting saw. I am probably okay given the small load, but I am going to reflect on it more since no one makes AV mounts for my old MACs and even NOS mounts are closing in on 30 years - plus they are expensive.
Ron
Actually I may be doing my AV a favor as the load of the tank and handle is much less than the suspended weight of the motor, bar, etc.