Easy 14-16' top slab milling rails.

[Kicker_92]

I used to use an angle finder and square to fix the same angles at both ends.

Those Wixey gauges are great for measuring twist, but make sure you keep the readout facing the same direction.

i.e. when you move the gauge to the other end of the log in the photo, you must keep to facing the same way it's shown. Otherwise it will show a false reading due to gravity.

They are very durable and accurate to +/- 0.1°, plus only about $40!