meh save your $$
at the end of the day those "motor master" gadgets are simply free-running the motor
which doesn't put any physical load on it at all... imho data is just meaningless numbers
may be useful to compare 2 (otherwise) identical motors but little else
Real dynos (koffkoff Turbo Dynamics) put an actual load on the motor to judge real power output.
breakin machines work better for 'mod' motors with ballbearings that won't wear out.
Also they have softer brushes than a typical sealed can's rockhard 'for life' brushes.
By the time you've run a Titan's brushes in... the bushings could be on their way out!
If you're new to the Slash &/or RC altogether, best advise is to go PRACTICE PRACTICE & PRACTICE.
Buy a whole bunch of decent battery packs so you can maximise your time on track when you're there.
Don't waste $$ buying odd gadgets when surefire way to the podium is simply practising your driving
and learn how setup the car properly to handle your race track.