dont be affraid to "make" a block, duro-block shape pretty easy witha 3" ginder.....
...which brings up another thought about "trueing" up blocks... i use a granite surface stone(sheet of glass/mirror would work as well) and 120gt.... then "block" the block.... makes them nice and flat, its amazing to see just how "worn" a block becomes after not much use. a lil off topic... but kinda related.
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