Got our kit built this weekend. My initial impressions of the SD build:
Upside: Well-made parts and molds. Drive train is very free without the work you put into freeing up the TC3.
Downside: Top plate is too flexy making the overall chassis a bit more flexy than you'd expect with a 3mm bottom plate. Wish Yok had spec'd teflon-sealed bearings, aluminum CVDs, fewer steel screws and maybe fewer plastic parts. Can't use AE springs (too long). Droop screws don't rest on chassis plate with kit suspension set up.