Never know the mechanical competence of people I've never Met.

Nubs on the back of the fork ? well If theres a disc tab on the back too ,
its buying wheels and the brakes And Labor to install it.

shop may throw in the work for less if you buy all the stuff there & not Amazon.

a still may be better to just get a new bike, with all the stuff on it,
the wheels and Brakes will be almost what they paid for the whole bike .

I set up my Maguras with a lot more than the RCH of clearance that Dynarider seems to think they require .

because he Doesn't own any.