I can't add anything except this, a pal had his stop working properly when dove hunting so he pulled the dipstick out of the truck and dripped about 3 drops off it. Shotgun went back to working just fine.

'Four legs good, two legs baaaad."
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"Jimmy, some of it's magic,
Some of it's tragic,
But I had a good life all the way."
(Jimmy Buffett)

SotG