Guidance growing out an Acer p

[iant]

I bought this green Acer p from Chris at Telperion this spring.
It's about 1.75" caliper at soil level. He recommended this one as he said the root spread was outstanding. I haven't peaked under the soil. It's in an Anderson flat and was repotted I think about 15 months ago. I plan to leave it for 2 seasons prior to repot. I don't have ground space currently to put it in the ground. That may change in a couple years if we ever scrap together enough down payment to buy a house in Silicon Valley (ouch.)
So my plan is to grow it out a bit more as I think these maples look best with about 3 inches or so at the base... I'm willing to spend 10-15 years developing the trunk prior to branch structure.
My questions are:
1) Should I just let everything grow wild between now and 3" or should I try to direct the growth into 4-5 branches. Right now it's sprouted all over and there are several small branchlets coming out at the exact same spots and everything is overlapping and cascading.
2) If my planned new trunk line is at "B" or "C" is there any utility at letting anything above that grow out? My understanding is that it wont help thicken the trunk until it gets to the diameter that it was already chopped at above.
3) Should I scrap the idea of making the base any thicker and just grow the new trunkline out now and accept a 2" base. (i.e. if you think I won't make it to 3" in 10-15 yrs.) (I think the tree is about 5 years old now (grown out in ground.)
Thanks for your advice!
I included a photo of both sides as shipped and then how it looks now on the bench.
Ian

 

[Ang3lfir3]

Take one of those anderson flats... fill it with pumice or lava and set the tree on top of that... giving the roots somewhere to go allowing you even more growth... (I learned that trick from Chris)

as far as branches go ... I would def make sure you aren't allowing anything that needs to be removed later to get too large as you will end up with large scars that end up taking a long time to cover up ... you are only wanting to get to about 3" with the trunk and i think that is something you can accomplish while designing the tree (it's only about 1" of caliper) and over the next few years I think you could get gain the needed size while growing out the new top etc... also I wouldn't worry about the size of the trunk too much ... it seems to be a nice size for a slender elegant tree, which fits the Acer P perfectly...

you will be pleased when you see the base that is under that tree .... the nebari is the #1 focus at Telperion and they have the experience to get it right! I just purchased a multi-trunk Acer P from Chris a few months ago... its sitting in the back yard going gang busters after the windy ride home.... I am looking forward to uncovering the base in about 2yrs

 

[davetree]

You are right about the nebari on Telperion's trees. I have a cork bark elm from them that has some of the best roots I have seen on this variety.