Hey there, i feel for you..don't get hurt by everyones comments.. your more than welcome here.. (this is a public forum) and You own the damn tree, you can do what ever the hell you what with it. That's your business.
What these folks are responding too (i think) is the fact that we get lots of newer bonsai student's on this forum talking big,making mistakes with there trees, trying to re-invent things or have a better way, and they don't or won't listen to good advise. And you asked for advise by posting with photo's. You really have to listen and learn from the experts on this and other forums, and not act or pretend like you know what your doing.(you may or not) First you said one thing, that you were going to chop and graft the tree, and now you are going to layer it into two tree's. who cares if it was defoliated or not, what ever??
Most people would think a tree like this should be grow out, in the ground or Anderson flat, homemade wooden box tile etc. What you are going for is size, taper and nabari (there are ratio's to follow) This is done by letting a leader grow and not chopping right away like you suggested or defoliating, this sets the tree back! Branching and or grafting come later, some times many years later... Bonsai takes a lot of time and Patience. You just can't make a show worthy trident in a season or two. Can you? It takes time!
The folks that have been doing this for 20,30or40 plus years, take this stuff serious! The members in my club are very strict and come from the John Naka days, the don't like the newbies (including myself after 5 years) acting like they know what there doing. Some also don't like to share there knowledge and secrets (right away) You have to earn respect sometimes.
Most are very cool and open to anybody..
BUT don't let all this discourage you. Have you joined one of the many clubs in the Los Angeles area? Most are all pretty good folks. Take some classes from Bob at Kimura(he's great) or Roy at Fuji in Sylmar(he's awsome) also you can Join Desconso bonsai club or in the valley Sansui-kai club. These are very talented people..along with Al (smoke) who is one of a few real experts with Trident Maples and other trees, along with bonsai display, woodworking, soils and humic acid ect.. You may want to go to the Golden State Bonsai Convention in Burbank, in Oct. You will hear critiques about trees that bring some owners to tears. Also great place to pick up some new material. like a new maple
always learn from the experts and good luck to you...
no disrespect..
just my 2cents