It is nearly impossible to get past the feeling of singing with your fingers in your ears with IEMs that are properly sealing in the ear canal to cut down stage volumes. Some have found that mixing on your own miked voice with reverb, and only above 1000hz or so can help, but the sound of your bone conducted voice will swamp that and its alot of hassle. Stick with hotspot type monitoring. For the record, I worked for Westone for over 5 years, they pretty much invented in ear monitoring.