Speedmaster intake porting. Hopefully I can make something out of this

DentalDart said
Does your foredom handpiece allow you to use 1/4in carbide burrs?

Yes I always buy the 44T hand piece made for wood work. It comes with the smaller collets but I only use 1/4 inch burrs. I buy my motors used and again bought a couple spares. I finally had to change out a set of brushes in 2020.