I've been looking into adding 'biners and rappel rings to my HH. Most people seem to use 2 single rings on either side but I was wondering if it could be done with one figure 8 ring on each side. Seems like it's 2 less pieces of equipment to have to worry about if it can be done with an 8 instead of separate ring. Anyone ever tried this, or know enough about rappel rings to give their 2 cents?