Chewing technique

[Cristiano88]

So i bought this chisell thing and according to their instructions i am chewing on the molars and according to the information provided in this forum i am chewing with my mouth closed(to minimize the activation of buccinators).

However is there any way to target the lower part of the masseters more than the upper part?
My reasoning is that the lower masseters give you that angular look while the upper just make your face bloated.

 

[Prettyboy]

Not really. With chisell/jawliner as you have to keep them strict on your molars which limits your options. I also chewing gum alongside these devices and with gum you have more room to play around how you chew plus you don't necessarily have to chew gum with your molars as opposed to chisell.