Re: [roostnureye] spacer foam?
i asked the same question of the manufacturer i was buying my rig from. they did not recommend, as it adds unnecessary bulk and weight. depending on what you will be doing, not likely that you'll be spending enough time in your harness for it to make an appreciable difference.
spend your money on a gopro(s), nobody will be able to tell / care if you're uncomfortable when they're watching sweet youtube clips.