Nice, thanks for the link. I hadn't heard the term "rubber banding" before, but that exactly describes what I end up with.

I think my backend and overall strategy are good, sending events rather than state, deterministic simulation, event buffering, client prediction, etc, ultimately my issues arise on the client side when using these frameworks, I haven't found one that considers how a game server operates, so it ends up requiring a good deal of hacking to inject server messages into the game state at the right places, and ultimately the math is always a little bit off, rounding issues add up, rubber banding appears, etc. I guess I could write my own engine from the ground up with a backend in mind, but I don't have the free time to make the engine and the client and the server and the actual game, so I was hoping that maybe Melon2 would have considered my use case.