(are .5mm's okay? I'm assuming its slightly better to go lower and have a slight gap, then having to shim to keep it free?)
0.5mm increments are OK, but <2mm isn't. The gap should be the smallest that never makes contact, it's part of the general design of integrated headsets that you might have to put one or more shims on top of the compression ring to acheive that.
0.5mm increments are OK, but <2mm isn't. The gap should be the smallest that never makes contact, it's part of the general design of integrated headsets that you might have to put one or more shims on top of the compression ring to acheive that.