Andy wrote:

Ballast towards the wings tips increases the g-limit at any given
weight versus ballast towards the wing root. It may or may not affect
the flutter limits - but my initial hypothesis would be that it
reduces the natural frequency of the wing in bending which would
probably help on flutter. /snip/
9B

For the usual wing that has some sweep back, wing bending provides
reduced AofA which is favorable: swept forward wings do the opposite,
unless they are very stiff. Lateral weight distribution plays into this
effect too.

Brian W