i bought the 3/8" version of that torquing tool.. seems to work well for $30..
previous experiences with electronic torque wrenches arent great, especially at high torque numbers, but im not sure the cost can be justified for a multiplier unless there is other things it will be used on..
i'd probably call some local truck shops and see if they can re-torque after you put it back together, if you are super concerned about it, which i really never have been..i make it as tight as i can with a long 1/2" breaker bar with a jack handle..
they say that bolt is to be replaced every time also.. does anyone replace it?