The solid nose ring seems to have fixed my problems. It still vibrates but the engine does not flop all around like it did so now I can at least tune it.
I am running a APC 17x12W that is very well balanced. On the ARIA above 4500 it was very smooth - just below that it started to resonate and the engine would sway. With the integrated nose ring it can twist but it won't sway at all.

I'll snap some pics tomorrow.