Finally got it mounted today. Will post pictures later. See if this link works: https://www.amazon.com/dp/B09KR91GSN...t_details&th=1

I do kind of like this one. Hard to beat for the price ($25, Amazon). What I do like about it is that it mounts on the seat rails that go up at an angle. This is different from the one I linked above, which shares the rails with the seat post. I like that one, but it limits the forward seat travel, and I prefer a more forward position. This new one allows the use of the entire mounting rail.

Another thing I like is the angle of the cages can be altered quite a bit pretty much from vertical to horizontal, whatever your preference.

Not ready to say there is anything I don't like about it yet. But one thing I hope to solve is my pump mounting. The way I have my bikes set up, I hang two bottle cages off the back of the seat. One I actually use for a bottle, but the other one holds a tool kit like what's pictured in the first pic of the OP. Next to that, and using the same mounting bracket, I mount a small pump. On my previous ones, just the way it was mounted had the pump tucked in a bit more. With this one, it sticks out a little bit. There's no interference the way it is, and when I'm on the bike my fat ass will keep it invisible to the wind. But still, I would prefer it to be a little closer to the frame.