I'm not sure what exactly you're asking for, but basically all the information you'll get can be found on pages like this one
, or this one
, and the IGLOO pages as well
(Although I wasn't aware that had been named Magella Eins, I thought it was still called the M-1!). Other than that fairly basic weapon info, we don't really know jack about how they work or anything like that.
As for tank aces, unless IGLOO included some, I don't know of any. Not that there should be a great number in any event, as the Federation Type-61s were largely cannon fodder for Zeon mobile suits, and every Zeon ace I've ever heard of was in those mobile suits and I can't recall any of them ever being associated with tanks.