Thes riser blocks with tramming pins worked exceptionally well since I had a pair of 8 ft long beams, I needed to mill about 1/4" off the entire length of 1 flange Nothing critical dimension wise, as long as they were somewhere within .010" to .020" over the length was fine with me. I didn't want to torch or plasma the flanges off since the heat would have caused warpage and that much grinding is one of those "I ain't the one" tasks.
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