The limestone quarries around here have giantic conveyors (or whatever they are called) that use 30 to 36" wide 1/2 or 3/4" thick belting to move and sort and load the stone. When they break one too many times for them to fix and they have to trash them they cannot take to to the dump (I guess for the same reason tires cannot go to dumps). Years ago we could just get permission to go in and get it and they were happy to be rid of it. Then we would cut it into strips and line stall floors. 3 strips of the big heavy stuff is best. Anymore the quarries, or the workers have been wanting paid for it though. I guess there is quite a demand for it from the racetrack nearby.
As for the saddle and ralide tree I was careful not to get a flex tree because I have to think that as well as flexing side to side they would also flex up and down and I didn't want any more bouncing action than necessary. After the first couple of rides I got real comfortable in it, and I call it my one-handed saddle I can pick it up in one hand the pad in the other and carry it around easily, then swing it back up on the stand one-handed when I'm done. I've taken my leather saddle home now so it doesn't get dry or damp or moldy at the barn, while the Abetta sits there and stays in great shape. When I haul the leather one down for a ride I do go Ahhh when I get on (it's an old Billy Cook though, paid a pretty penny for it). Then when I get back on the Abetta I say Ahh again, so I guess I really like it.