This is a steal. The 1c is superior to the knockoffs on ebay and gasbike by far, just supposedly has an issue with the 12t breaking the pawls in the freewheel. I never seen an issue with my freewheel sprocket... I accidentally ruined my 1c, my fault alone, after around 17k miles on it... I cross-threaded the output shaft at night trying to replace the woodruff key...
I prefer it over the 1b, it's 1 less shaft to pedal engine off, and less rotational loss when coasting.