Usually the rings don't give a problem when installed, as they are captivated in the groove.
Watch that the needle stays seated.
Many times it only takes a hair to cause a seepage when setting unused.
but after some usage usually any "stuff" that gets in the line, works itself through without further problems
The neoprene will tolerate the regular 10% alky,
it it the higher percentage blends they speak of, that causes problems.
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