I would caution about working close to your pain threshold. If you do any sort of electrolysis, you gradually learn to tolerate the pain and when you begin to master this, you can apply more power than is needed or safe.
Different areas of the body require different settings. I suggest starting at the very lowest setting and try different amounts of application time. Test with a very slight tug on the hair at 30 seconds and try another 30 seconds (or less) if the hair still provided resistence to pulling out. If the hair still seems to be unaffected, turn the setting up slightly and try a different hair of equal diameter and depth in the same general area. Big, deep hairs may need higher settings (I would suggest never going past the half way point of maximum power) and fine, shallow hairs should only use the lowest setting as these can easily result in skin damage if too much energy is applied as a treatment.
Galvanic electrolysis is always slow. If you are applying a high enough setting to apply adequate energy to complete the treatment in 10 seconds, it may take only an additional second to do permanent damage. At the lower settings you have more leeway and the oncoming indications of slight pain which indicate that you should cease providing treatment will be easier to detect.
I did many treatments that were successful with a 15 second treatment, but I believe I was too impatient. I graduated to lower settings at 30 second treatments which give me more control and much less risk of damage to the skin. Your own pain tolerance levels may require even lower settings of longer duration.