I can't figure out completely how jury struts work.

I clearly understand that jury struts can help and suppress buckling
of struts in compression (with spar in tension in negative load).
I've calculated deflexion of spar in compression (at +6G in positive load) and
found it of few inches (with 2.5" OD 0.083" wall 6061T6 tube spar). Although nothing
is wrong with that, I'm quite upset with flaps behind rear spar (my design
is with plain flaps and not junkers avid kitfox style flaps) and would like
to have your opinion about jury struts in this case.

Does it alleviate spar deflexion and how much in this case ? (I can't
imagine that jury struts report all their load and make the struts(in tension)
only bend, but it could be the case (why not?)).
If you can share an article, paper or proper explanation of this (I'd like to
have figures for my design and not only (that would be however welcome)
intuition about the phenomenon), it would be of great help.

A definitive answer would be to test in reality loads of the wing but
it's just at the design stage at this time.

note: I made the deflexion calculus with plain spruce spar and it's
much less, so the problem is only with aluminium round spar. Having
greater inertia (bigger spar) isn't an option for me.