I like them when they work, they look and sound sick. My one issue with them is that there was too much play in how the gears were set up, so I made the suggestion to @MorrisHsu to change the design, which he did. Now the new added thrust bearing seems to be doing well and there is no longer any play in the gears at all. I’ve yet to take the new one out but hope they perform well.
and yes @b264 they sound like the future