You don't need ANY fancy tool for what is known as angle torquing. What you DO need is about a half hour of uninterrupted time and good physical condition.

Once you have done the initial torque in sequence with a torque wrench, use a breaker bar and a cheater pipe if you need it. Start in the beginning of the sequence and turn each bolt 1/4 turn in sequence. THEN start through the sequence again and turn each bolt an additional 1/4 turn. This 1/4 turn does not have to be EXACTLY 90 degrees! Just turn it as close as you can to 90 degrees. This is a right angle and is very easy to visualize.

While you are involved in this procedure don't allow yourself to be distracted and DO NOT leave or abandon the process unless the building catches fire or an equal emergency. If the phone rings, ignore it. If the wife tells you it's time for dinner, tell her to keep it warm. DO NOT lose your place in the sequence.

It's okay to pause long enough to catch your breath and unless you are in Triathlon training or equivalent you WILL have to catch your breath. Pausing to catch your breath is okay. Walking away from a head that is not completely finished in the torquing process is definitely NOT okay.