Hi all, Just wondered if anyone has experience of the A and non-A versions of the LM399. I.E. 0.3 - 1ppm max., versus 0.3 - 2ppm max. In reality, is it worth the extra cost for the 1ppm max. version.................or in normal typical circumstances are they generally going to perform not as far apart? Thanks, Ian. [Sent by MDaemon Mail Server at IanJohnston.com]