Agreed. My Chenin is not stock anymore. By the way, the Radio Museum site lists the current draw of the GZ33 as 2.8 amps, same as the GZ37, which is why I figured that there would not be a problem since the Chenin is approved by Mick to run GZ37s. They even have a picture of a Mullard GZ33 on the page (looks just like mine, except mine has yellow lettering - only done in 1964 from my understanding).
http://www.radiomuseum.org/tubes/tube_gz33.html
http://www.radiomuseum.org/tubes/tube_gz33.html

