Just be careful switching from HL to Torro/Taigen/Mato. Sometimes suspension arms, idlers, sprockets, and tracks can have some compatibility issues. For instance you can't use some Taigen/Torro/Mato sprockets with HL tracks and vise versa. Some work, but some don't. For tracks you typically want to match the sprocket manufacturer to the track manufacturer unless specifically says it will work. Some sprockets have a different backspacing also like the HL sprocket bore is shallower than the Taigen sprocket bore on the KV-1 sprockets so you may need to match the sprockets to the gearbox type or swap the final output shaft to a different length shaft. There really is no hard and fast rule that everything from X will fit Y.