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So the suggestion then is not to use the high angle BU blades, but simply modify bevels on 25 degree blades? I believe I have two 38 degree BU blades, which I fully understand can be very hard to regrind. I am just wondering if it might make sense to hollow grind these higher plane blades if one has a CBN wheel? Want all the advantages apply to a hollow ground high angle plane blade once we get the hollow in it?
Mike, since realizing that cambers on the thick BU blades would be difficult on all but a 25 degree primary bevel, my recommendation has been only get blades with a 25 degree bevel. You can nominate this when purchasing a new plane from LV. However, if you have blades that came with higher primary bevels, the choice is whether to grind them or not. I ground mine to 25 degrees.