Snowboard edge question
I have an old 2001 Nitro suprateam that I love, but I doesn't seem to hold an edge anymore, no matter how much I sharpen it (89 side bevel). There is a good amount of metal edge left.
The other day I was carving down the blacks and my back edge was so squirrely , I felt like I was gonna wash out with each backside carve. I thought it may have been due to icy condiftions, Yet when I switched to my Battaleon Jam and even my noodle Nitro Subpop, the edge hold was outstanding.
Is there some filing technique I am missing? I've been tuning my own board for 10 years. I would hate to retire my beloved Nitro suprateam.