KT-120s in a c-j Premier 11A

Has anyone tried the KT-120s in a Premier 11A amp? I've used them in a Premier 140 with no issues and liked how they sounded. I was wondering if anyone's tried them yet in this older model. When I called c-j months ago, I'd gotten the usual party line about their techs recommending not using anything other than stock tubes in the 140.

Thanks in advance.