the only exercise thats good for "cutting" is cardio.
there is no special way to do a movement that classifies it as cutting or bulking. the only thing you are working with is endurance, power, growth or strength or a combination thereof. rep ranges, speeds and TUT take care of that.
what you are doing sounds hard but is isometric by nature. its cool that it stops all momentum but why stop in the halfway mark, what makes it any different than stopping 75% of the way up? there is no reasoning. its like 21's for biceps, they are hard...thats it.
just as a joke....
fork curls for bulking
table pushaways for cutting