It is still dark right now, so here is a previous pic of my oldest son when we were checking his form.Sounds very nice and I'm sure it's fun training with your Son's. Post a pick or two of your set up when you have a chance. Stay Safe !
It also shows in the background where I am laying forms for a concrete pad which may become the future home of the gym. Completely dependent upon my ability to create a water-proof stable covering, yet open on one end.