Gauge scale

Hi,

I'm trying to add a Gauge widget in a layout. I did like described in the Gauge sample of your showcase. It seems to work at first sight (gauge displayed, sectors created, value set).
My problem is that, even if I give a width and an height to the gauge, it's always drawn using the same (big) scale... so if I want to draw a gauge which is smaller than the one visible on the showcase, I can't: the same size if used but the gauge is cropped...

How can I draw a smaller gauge then?

Many thanks for your help,

Thomas

PS: We are using SGWT 4.1p