I hone with two hands - always have always will. I don't have any issues with too much or uneven pressure - in fact I find I can delicately moderate the pressure from heel to tip with two hands and it makes rolling strokes very simple. I find my left hand (the hand at the tip) is mainly a guide and often doesn't apply pressure at all. I use my right hand to execute most of the motion and apply a bit of torque if need be. Every blade needs a different stroke and part of learning how to hone is looking at a blade and deciding how best to tackle it. I think there are several "honemeisters" who hone with two hands...

John