Doepfer

Hello list, I've an A101-2 LPG and think a mixed bag. Basically I like
it's sound *but* totally dislike it's self oscilation. Even though the
filter itself is rather smooth sounding the self oscilation comes all
of a sudden and hardly sounds musically to my ears.

Is there any way to help it? Using the trimpots? Changing the
vactrols? (I've to shop for VTL5C3 vactrols anyway.)