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At least we both agree the current configuration needs help. The only way to really help the 4 wheels is to have the concentric nuts on the outside and use longer bolts so you can fiddle with them while in the track. The trike setup does make the adjustments easier and less expensive to use 1 less wheel. The goal was to make it entirely self-adjusting but there's not a lot of room to work in for a "printed" suspension system to work. I have 2 directions to go from here and I'm currently travelling down one and hope to have some solid results this weekend.