A Sinar P/P2 lets you determine the tilt angle on the rear standard by eye, and the scales let you apply that movement relatively easily to the front standard, if you want front tilt instead of rear. You could do the same on a camera without scales, like the Ebony, as long as you have a device for measuring the tilt and swing angles.

An F/1/2 lets you determine the tilt angle with a built-in calculator, based on the near and far focus points that coincide with dashed lines on the groundglass, and once you know the angle from the calculator, you can apply it to either standard.

Both work pretty well. The P is a bit faster to use, but the F is more portable.