There is more to making the bridge than meets the eye. It wants to be as light as possible so as to augment movement, vibration and sound, yet it must be thick enough to have a saddle slot deep enough to hold the saddle securely.
The Kasha bridge adds complications as it is so wide at one end, tapering to very narrow at the treble end. In order to get a sharp string angle to the string hole, I like to shave the back side of the bridge thinner than the front. .
I use a curved scraper to thin down the lower side so that the string will bend sharply over the saddle. I think I will take some more off of this.
There will be lots of curves in this bridge when it is done to my satisfaction. That bone saddle will be a lot lower too. The bridge and saddle dictate how high the strings will be over the fretboard, a key element of the instruments action. It needs to be just right. The thicker the fretboard, the higher the saddle can be.