5% has never been low load, to my knowledge... that's the highest that I've heard of.
The Carbide Plus (supposed to be the same as the Carbide/C) is listed as 5%... the Eliminator is a light load coverstock, but I haven't found distinct numbers for the load percent.
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"A word to the wise ain't necessary -- it's the stupid ones that need the advice." Bill Cosby
"Never argue with an idiot. They bring you down to their level and beat you with experience."