I would think that to get up " past the up position" you would need to disconnect the cables at some point. I have never done it but that would be common sense to me. I would also think the seal at the bottom would have to be removed if you wanted to go higher than that. Why do you?
Farm jacks would work for raising it and then you support it with equal length 2x4s at each corner. I don't know what impact it would have n the guides that the top slides along. Others may have an opinion on this.
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2201 TL
2010 Nissan Titan king cab SE
4x4
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