I think what you did will be alright, it should be centered, imo. As to any muzzle rise compensating benefits, you may or may not see any, although it does appear that it would direct gases upwards and sideways. That looks more like a flash hider to me, but either way, the SKS doesn't have much kick to it hence you may not notice the benefit. If you've got it centered, just leave it be. So long as you like it, that all that matters
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