"Papa3" wrote

scissors jack suffers from the fact that the lift vector is at a
miniumum when fully compressed - ie. just when we need it most in

I use a horizontal hydraulic cylinder and the upper part of a scissors jack.
Erik is still right about the lift vector, but you can gain a little over a
real scissors jack. My ramp cannot tilt, so lifting in the middle only works
well for me.

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Michael