John,
Using the arms for placing counter weight should make it turn better. I've been thinking about using a frame somewhat like the you have with a round pipe out one end and a mount somewhat like an engine stand. I do like the idea you can stand the machine head upright and turn it around. I haven't figured out exactly how I could do that with my idea without making two base mounts. At this point I haven't got into collecting bad enough to really need a stand, but building one would sure make it simpler to fix the 3 I've collected so far.
David