Well if you change part of the product then I wouldn’t warranty it.
Like when you remap a car and the turbo blows then try to claim manufacturer fault ..
Niche are not commercial machines, there finely designed consumer products,
Chuck these burrs in a mazzer kony no issues the motor can take it, the niche it could destroy the gearbox inside, or trash the motor brushes.
Just not so sure it’s a great move,
If the worst happens I don’t even know if you can buy spare parts for the niche.