<number id="delta" type="slider" arg="-delta %"
_label="MetaBall Movement" _low-label="Small" _high-label="Big" low="1" high="20" default="3"/>
- <number id="speed" type="slider" arg="-delay %"
+ <number id="delay" type="slider" arg="-delay %"
_label="Speed" _low-label="Slow" _high-label="Fast"
low="0" high="20000" default="5000"
convert="invert"/>