Cut and weld
My wife is 5'4" and could not touch the floor with the stock seats. My stock pedestals were 11": probably 9" would be best for you, but are over $200. They are not hard to change. Anyway, I cut 1-3/4" out of the pedestal main post and re-welded it, but only the driver's side. It did not take long - a welding shop would charge way less than new pedestals. The passenger side is about right for the fold out desk. We put spacers under the carpet on the passenger side. We tried spacing up the floor on the driver's side but that made getting to the foot controls dangerous. I am 5'9" and think the new position is more comfortable.
Adjusting the seat forward and backward or swiveling is made unnecessarily difficult by the decorative "skirts" that attempt to hide the ever so ugly seat base... what? Get the skirts out of the way to see if that helps.
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