I'd agree with Utopia, it's about getting them on evenly with a final tightening which I'd've done by feel. I only ever used a torque wrench for cylinder heads tbh. Most of the forces on the spindle are upwards into the fork legs. I knew someone many moons ago who rode a bike for a distance with the front spindle clamps missing. He'd got distracted and forgot to put them on. Luckily it was studs in the fork legs with nuts to hold the clamps on. I think it was a wee bit clunky.
__________________
..
~
|