594 tailpiece height

[Timmy]

When I got to cleaning the bridge I released it's begun to go ever so slightly concave from the center

Mine MIGHT be very slightly concave on the top under tension, looking at it from the bass side e to e,
it seems to be slightly concave. Looking at it from the treble side e to e however, it looks flat! Bottom looks flat..
Next string change, I'll pull it off and see what it's like with no tension.