Interesting that this is max 51t cassette, whereas the mtb version is 52t.
Looking forward to reviews and pricing. I've seen Sram mullet mini groupsets for $750... however this Wheeltop would allow the keeping and using of 11sp cassettes, chains and freehub bodies, which is additional cost saving initially, but with options to uprade to more gears later.
Update,
Wheeltop website is around $675, so not a big difference from Sram..... Sram comes with the comfort of local support (I'm in the process of replacing an chinese power meter crank on warranty, local support would've been easier and quicker, even though the manufacturer was very helpful)