An idea about the MPA-3 plunger......
I have some 1\4 inch delrin that Im going to thread and screw into the plunger, then I'm gonna take a stainless screw, machine it to have a round, flat head and screw that into the top.

. the screw is not stainless (i dont think) but i could have easily got one, but i wanna minimize cost....

im still a noob
)
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