As a side note, I’m not sure if this is a “best practice” or not, but in 3dsMax, I assign LOD’s as a 0-5%, 5% - 25%, 25% - 50%, 50% - 75%, and 75% - 100% for the LOD min/ sizes.
One quick question though due to a brain hiccup, do LOD’s need to match the location + pivot point location to the original object? I think it does, but cannot remember off the top of my head.