Yes it snapped on pull out with the 18x10
As for the virtical performance
I was wondering the same thing, I have no clue I run 12% nitro in the moki and the only thing I can think is that its over revving or something. It may not have been tuned right but I took the tach to it on the ground.

But the performance spoke for itself the 18x8 fell over where the 18/10 kept going I might try again this weekend and try tuning a little more.