I haven't seen any posts mentioning this yet, but the wobble shown in your video might only be related to the positioning of the slipper clutch spring..
I was able to duplicate this issue with my DB-01 when I first built the slipper assembly. I did not center the spring on the layshaft correctly which caused an artificial wobble effect (it also put uneven pressure on the nylock nut which enhanced the effect).
All problems were solved after holding the spring in-line with the nylock nut while I tightened them down.
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