Yes, don't bother buying another meter if you already have one!

Simply grab a calculator, measure the length of the control surface at the point where you measure it, multiply this length by the SIN of the desired control throw. The output is the deflection measured in inches (or mm, whatever you used to measure the control surface).

For the elevator, the manual say to use 12 degrees for the low-rate throw. Assuming the elevator is 2 inches at the point where we measure the throw, here is the math: (2 inches)* (sine of 12*) = 0.416". For 40 degrees it is (2") * (sine 40) = 1.29".

Setting throws is pretty straight forward this way.