Tugs on a conversion

tynan Anyone here run their conversion or track bike without chain tugs ?
Will cranking down the track nuts real tight hold the wheel enough or is it simply worth getting tugs so you don't have to over torque your track nuts (and screw up the threads) ?

I still haven't bothered with tugs on the Soma. It has front and rear brakes, Phils with allen bolts and tends to be ridden more gently than my other bikes. Just for reference.