In reply to Roberttaylor: Another vote for panpipes if you have screws with big hangers, 360s etc. The grivel one is well designed as it has a waist and shoulder strap that holds them it place so you don't have to wrestle the screws out. You can lash one up from flutes with some gaffer tape and a couple of adjustable tape belts if you can't get a ready made one.
Only downer is that you always have to use the same hand to get the screws out, but I always prefer to use my right (dominant) hand to place screws anyway, so hang the panpipe on the left. Having a lot less clutter on the harness, being able to high-step without stabbing your thighs and not loosing screws from clippers more than makes up for it