To REWIRE or LET BE: a speakers question

After asking around & getting conflicting advice, here I am again soliciting you, a-goners who have given me the BEST advice to-date to all my quests.
Should I change the internal wiring of my Gen Vs or will this upset the speakers sound balance / tuning?
The local dealer was all for it("sure, I'LL do it for you, have the right cables, too..."), the manufacturer hasn't answered (yet?), people around me say: forget it, you'll blow the tuning.

Apart from the sonic "danger", each speaker has 8 units, so the investment in wire & labour is considerable...

Has anyone tried this, or have an opinion? Thanks in advance!