I doubt the usage of 904L but would be happy to be wrong. The so called 4130 clone (which in my eyes isn't a clone at all...it's just another decorated asian movement...the SH3135 or the Yuki movement is a clone since it's able to take gen parts!) is a downturn for me.
I was waiting some month for this movement and if it would have been a real clone like the SH313x movements I'd take it even when it would not have been clear if it's reliable or not.
But a 7750 without chrono function doesn't make any sense for me. If thickness would've been something I care about I would've taken a JF with 23j movement. But for me the function is more important. At the end it's a watch for me and I like my watches to function as they are planned to. I doubt that anyone is able to see that the rep Daytona on my wrist is thicker than a gen and therefore easy to spot as a rep. The only ones who are able to spot this are, and I'm pretty confident about that, part of our rep community