yeah thats what i had in mind too but kinda doubt if there will be nice transition + to get some matching branches and some ramification i think you may need an extra 10 to 20 years if not more.I have no idea, but I think it will take at least 10 years just to build the rest of the trunk. My plan is to ground layer this one next year, then probably put it back in the ground for a few years.
so i wonder, if this is really worth it. i would think it may be easier to build a convincing maple starting from younger thinner material then this. i may be wrong but thats just what i think though,