Ninja regulator - replacement ball for valve seat

[Motorhead]

I have a lathe and correct tooling / surfacing miens.
Jason has this Q squarely in his corner now 

[nervoustrigger]

Thanks Scott.  Thanks Mike.

Jeremy, a variety pack of fine grits like this will keep you going for a long time.
https://www.aliexpress.com/item/4000064335002.html

Domestically I expect you're most likely to find it sold for automotive body work and paint.

[nervoustrigger]

I stepped outside a few minutes ago to check for any evidence of creep from the no-name reg fitted with a PEEK seat:



Looks good to me.  And an accurate wadcutter leaving at 920fps looks very, very bad for the gray squirrels and chipmunks.