Cool. Good to know the button isn't built into the head. I wish I could get one of these for my picco or lrp but it's hard enough to keep temps up as it is. My engines always run cool for some reason. I often have trouble keeping them above 200f unless it's really hot outside so I think my engine would run too cool with one of these heads that can lower temps by 40%. I found a pic of this cool weather head that would be perfect if I could find one.
http://www.redrc.net/2006/11/nova-rc...-weather-head/