[sdiy] Modding Matrix 6R PSU?

[cheater cheater]

Hi guys,
I have recently bought a Matrix6R. It's a 120V version, supposedly.
However, it turns out that the transformer inside it is rated as:

100V/230V
41V    30VA

..which looks promising I guess?

The whole marking on it is:
BANDO EP-55
(307-01257)
BE2-GJM

61-12663
100V/230V
41V 30VA
and then a line of Japanese :)

soooo.... anyone got a clue what I'd do to make this thing eat 230V?

Thanks
D.