Take this one off my hands and then you have 2 of themclosetbonsai wrote:Hi Matt, I have a benjamina much the same at home in a large pot that i want to bonsai but never what i could do with it. It is about 5 or 6 trunks out of one big root mass.

I say get in & flat top the roots. I wish i had reduced another 3-4cm from the base. it would fit a shallower pot easier in the long run. Pick the line on the roots you want to meet the soil & then add 3cm extra all round to allow for die back.. Some guys wouldnt bother, I always prefer to take more roots than less when collecting trees.
You can take off more later but you cant replace it once its cut. Dont discount keeping the whole surface root network the tangled twisted roots if you like the look & it compliments the trunks.
When you get fired up to do it take some pics to share with us all.
Matt