I say go big. TM heal up very well, even over huge scars.
I'd cut away the larger of the twin trunks and keep the smaller one. That already gives you better taper.
Mark the place where you want to make the cut now - use a permanent marker. Don't cut it yet.
The cut line has to be visible underneath all the leaves in late spring when you actually do the cut. When you cut it away you want to make a smooth cut and then use a very sharp blade to smooth out the very edge of the scar even further. You can apply a thin layer of cut paste over the scar just in case.
I woudn't remove any other growth as firstly it needs a lot of vigour to get the scar rolling over the cut and secondly you can't accurately predict what branches you will want to keep once the big trunk is gone and you get to see a whole diferent tree..
The following user(s) said Thank You: appleaNbananas, Tropfrog
Please see potted up plant. I ended up getting a much better tree. I potted it up and removed a bunch of ancillary twigs that won't be used. Long term what do you see? What cuts should I make now vs this upcoming winter. Fantastic root flare
This message has attachments images. Please log in or register to see it.