My thermostat is crying to be replaced. The Family Album shows an 87°C one, p/n 069 121 113. What passes for memory today is whispering in my ear that a 90°C thermostat is also avaliable. Two questions: 1) is the 90°C one better in any way, other than "more is better", and if so, what is its part number? TIA. -Ian Duff.