I have been working on this trident maple from a cutting struck in the early 80's.  It should be more advanced, by now, but it has been a victim of my limited time.  It is finally getting some attention.  The final stage of (initial) development is to thicken the lower branch with these sacrificial growth.  The rest of the tree is being refined and the leaves and inter-nodes are reducing nicely.  See what is for sale in the Gallery Bonsai For Sale.