I expect this to be controversial, but I decided I’ll put this opinion out there: I think it’s time to stop putting disk brake tabs on the righthand side of the frame. Time has shown that 100mm bearing spacing hubs, even with an inboard disk brake produce plenty strong enough wheels - not only with the bullet proof rims we tend to have on unicycles, but with light carbon fiber rims too.
There is no reason to lock people into one choice of cranks and pedal spacing (looking at you, KH unicycles). No reason to make the fit of crank splines a critical dimension to the brake rubbing, and to move braking forces through that interface.
I’m especially getting tired of frames with two brake tabs being labeled as an “advantage”. For most people, that is an unecessary part, which adds cost and weight. I’ve seen people spend extra money, or choose less strong parts for similar weight savings as not having that tab would deliver.
There are enough spirit cranks left for Schlumpf owners who want an external disk brake, and they have enough money to get a tab welded onto their frame. So can those people that believe they need the wider flange spacing (for whatever reason). No need to crowdfund their disk tab through the majority of riders, who end up with extra weight and stress from welding in their frame.