[rexi]

I have a post puller or frame machine and it uses pneumatics and
hydraulics. the pump is connected to my compressor witch pumps the
fluid into the ram,slow but real strong.

If this chair is to react to video game software ,it needs to be quick
and smooth.Maybe even use an electric motor ,that would pull and
push the chair from side to side,or just push with an opposable spring
of some kind.Braking would be quicker motion forward and a slower
motion coming back to normal position and the reverse of that for
acceleration.Also the chair would have to lean and accelerate at
the same time.Any Ideas I can get get would greatly appreciated.