I could of made them myself, yes. The consideration that let the pro's do it was- there is a 'special' T that you have to have/build to connect the soft and hard lines, on the rear axle. That had to be specially fab'd.as they never made one for the VX. You probably know there isn't alot of soft line. As well, brakes+3995 lb car+BRAKES+failure??(haven't made to many lines myself)+BRAKES= For 200 clams. Makes sense to me pony up 200 big ones. I'd rather let the big dogs do there thing.
As far as the performance- totally solid. ABS is more active which is kind of wierd. Much more dive on hard braking. And pedal modulation was much more sensitive.
Rotor and caliper upgrades would be smooth. Lot of cheddar though...good luck on the project