I've heard alot about LD's famous customer service, however im sad to say I havent encountered it with my purchase of the MkIV in the last month or so. My amp wad DOA with a bad output tube (sov 6H30), when requesting a replacement LD has stalled with multiple excuses (tube shortage, QC testing...

Hi guys, I'm an alessandro MS-1 owner, and I'm looking to buy a tube amp for it. I've narrowed my search down to a Little Dot, however I'm uncertain as to which one, the MkIII or the MkIV, could anyone enlighten me as to the sound and operating differences between the two? and weither these...