Originally Posted by dan_vector

It seems that you took my tongue in cheek response literally! Over the years you get a feel for it and know how tight things need to be without having to use a torque wrench for everything. I'm an aircraft engineer and spend most of my days dealing with ensuring things are correctly torqued to very tight specs. I can hand tighten bolts and be so very close to the correct torque when final torque loaded with the correct torque wrench. So for me I don't need to worry. If you have little 'feeling' then knock yourself out.... Not needed in my opinion for the most part, don't over think it. In all the years I've been racing nitro I've never seen anyone use a torque wrench on head bolts - if you can do any damage to those using a normal flat head screw driver or allen driver (not a 1/4 drive 90 degree wrench!) then you are much stronger than I am.