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i would say mount them on the line. 4frnt only has one mounting line, not a midsole and center line, because their line is where the ski should be mounted to perform it's best. i was skeptical of this when i got tnks last year, but they were money and i was used to skiing a symetrical park ski. with the ehp being a pintail and you not really planning on skiing switch, i think you would be fine putting it on the line.