son managing his emotions

[abrightday]

My son is 7. He is articulate and sociable. He has ongoing problems managing his anger and I don't know how to help him with this.
I have read articles which highlight the importance of being a good role model and I don't think I am that. I can recall many instances where I have been angry and under stress and I have handled a situation badly in anger. I don't throw thinks or swear and shout but I am overwhelmed with anxiety and take a long time to reach an equilibrium. I have received some counselling and am addressing this but changing oneself or moving on emotionally is not a quick fix. I am not an unstable person. I have a good core of strong friendships and in many ways am well adjusted and kind. I am my son's main role model as I am a single parent without a family here.
My son seems to reach a boiling point when he is upset, frustrated or angry. He stomps off, makes threatening gestures, threatens revenge and eventually sobs his heart out. He is very good at talking about his feelings and whilst this is a good first step it doesn't seem to go anywhere after that. I have talked to him about anger and how everyone feels angry and upset from time to time. We have talked about it not lasting forever and how it is important to be able to accept feelings of anger. However I don't feel that I am helping my son. If anything his temper tantrums are getting more explosive. He has however made some progress in that he now rarely hits or lashes out.
Can anyone help me with this?

[EveryoneTalkAboutPopMusic]

Can't offer much help sorry. There is an increase in testosterone at 7. Could that be it?