Walbro brass needle and seat question. John deere STX38 CV13

My Kohler CV13 carb. leaks after shutoff. I got the needle and seat kit. 12 757 03-S
Walbro LMK 63 0217 1205377.

The info. says to "Drop enclosed valve seat into retainer with identification marks facing down" (84-215)
"Press retaining ring with a .213 dia. drill blank so it presses valve seat to depth."
Question....Do I remove the brass seat first? or press the rubber seat in with the brass in place????
"Use 82-85 inlet needlee valve in carburetors that have BRASS valve seat and dated after 2553" ?

Thanks
Feb. 27

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Walbro brass needle and seat question. John deere STX38 CV13