<!-- #### default is wrong -->
<number id="radius" type="spinbutton" arg="-radius %"
- _label="Seed Radius" low="1" high="1000" default="500"/>
+ _label="Seed Radius" low="1" high="60" default="15"/>
<number id="epoch" type="slider" arg="-epoch %"
_label="Epoch" _low-label="Small" _high-label="Large"