I'm doing a run of 10 x TWD's - Temperature Warning Device Latest count is 8 Zeds* saved from potential melt-down [out of 100+ TWD's already installed] so I thought it worthwhile to offer these now ... before summer. If interested please read the above Tech/LINK and PM for more detail. Price remains same as previous GB's @ $50 (+ p&p $5, or $7 registered/insured) NOTE: All pre-built TWD's are fully tested & calibrated for 95deg ON with a RED flashing LED. Installation takes an hour or so with NO soldering involved. * Always interested to hear feedback on existing installations ... feel free to post here.