I've used mine in AK during the sport season, and also down in OR when I used to process fish for Tony's in the off season. Sport season might see 2-6 dozen fish hit the table every day, but when I cut fish for a living, I was doing a 2500 pound tote in 2 hours. Well over 400 fish per day. I still have the same old work sharp I started with years ago, and I still love it. I keep all of my old belts too. Every once in a while I really like to put a polish on that burr, and the belts that are barely hangin on will put a laser edge on some blades!
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The right angle?..Seems like 90 degrees is 'bout right.