Type 45 Tubes for stereo amplifiers

A little off the subject but has anyone had experience with KR Audio tubes?

I’ve got four Gold Lion KT88s, nearly new, in the C-J ART27 amp now and wondering if I would hear a difference with the KR Audio tubes.

A bit pricy at 1300 for the set.

Thanks

Great thread, thanks all.

I’m beginning my flea watt amp adventure starting with the 300b, followed by 45 and a 2a3 amps.  After verifying with the designer/manufacturer I’m fortunate my 100db speaker can handle the 45.

my 101db efficient Cornwall IV speakers sing with my type 45 mono amps