As far as the SMANs for sale since their short existence they are abundant on E-Bay in used condition. Many I've seen are cracked up the front have broken temp clamps or missing parts all together.
As far as your opinions on clamps you are wrong and I will post a video. The whole backside of the sensor is exposed to air!!! the contact surface vs sensor surface is huge. Any point not close to contact with a pipe is being influenced and averaged with outside air temp. For now look at Eddies video of the SMAN3 vs the 570 and please explain why his SMAN3 suction temp. is that far off (warmer) and why he prefers the 570 now. Have a good week end guys