The approach to Kant called the Friesian School does not engage with the major interpretations of Kant. It sort of stands alone  ''Take it or leave it.'' as you might hear when you go to buy at the supermarket.

I think this isolates this school  from academia, and also makes it hard to place in the Kantian Spectrum.  

I mean  to say that the major interpreters of Kant are Cohen [Marburg school], Allison, Strawson, Sellers. [The later Cohen diverged from Kant.] And besides them there are the many approaches influenced by Kant--like the later Cohen. Where does immediate nonintuitive knowledge [of the Friesian school] fit or not fit with all this?  In what areas do they agree and in what areas disagree and why?