Re: Springfield taperlock pedestals remove?
If they have not been removed recently, good luck.
Squeeze the release tab and apply great amounts of upward pressure.
Its hard to swing a hammer up under the seat, tried.
Its hard to get your shoulder under the seat to push up, tried.
I have seen people use a bottle jack and a 6" piece of 2x4 to jack between the seat base swivel, and the floor.
Be careful.
You might want to hold the release tab with either a hose clamp, or duct tape, so both hands are free to throw things when you get frustrated.