Some of the nice twin trunk trees you see were once double planted nursery plants that happened to work out looking good. The older they get the less noticeable the union is. But that takes a very long time and I am wondering if I can help the process along. I have a small Mugo that was an early on nursey plant. The best I could manage for where I was looking. It is of course two plants in one pot and I would like to not separate them. One is somewhat upright and one leans out like it wants to cascade. I think it could eventually look real nice to have a fused trunk. Of course being bound would be a start but do I just cinch them up with grafter's tape and style branches back outward, and wait for a long time? Would it be better to bind them in copper wire and let it bite in, restricting their outward movement? Should any of the cambium be removed where they will touch or is this not appropriate for pines? I searched out a post about restructuring an old spindly Mugo and I'm pretty sure someone mentioned bending the branches back to approach graft them to the trunk. Any suggestions appreciated.