Here is my Whirlwind (Williams 1990)(Fan MOD) directb2s Backglass File, i did that a time ago.
Siggi with this nice Redraw ( at VPinball ) motivated me, to re-optimize my Version: you can choose "Authentic" or "Fantasy",
at least with Fantasy, you will get the Fan - Animation, when it should be active like at the real Machine !
Full Credits to Wildman, i used his latest fine BG for that !
Have Fun !